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# http://pyrocko.org - GPLv3 

# 

# The Pyrocko Developers, 21st Century 

# ---|P------/S----------~Lg---------- 

''' 

Module to read and write GSE2.0, GSE2.1, and IMS1.0 files. 

''' 

from __future__ import print_function, absolute_import 

 

import sys 

import re 

import logging 

 

from . import util 

from .io_common import FileLoadError, FileSaveError 

from pyrocko.guts import ( 

Object, String, StringChoice, Timestamp, Int, Float, List, Bool, Complex, 

ValidationError) 

 

try: 

range = xrange 

except NameError: 

pass 

 

logger = logging.getLogger('pyrocko.io.ims') 

 

km = 1000. 

nm_per_s = 1.0e-9 

 

g_versions = ('GSE2.0', 'GSE2.1', 'IMS1.0') 

g_dialects = ('NOR_NDC', 'USA_DMC') 

 

 

class SerializeError(Exception): 

''' 

Raised when serialization of an IMS/GSE2 object fails. 

''' 

pass 

 

 

class DeserializeError(Exception): 

''' 

Raised when deserialization of an IMS/GSE2 object fails. 

''' 

 

def __init__(self, *args, **kwargs): 

Exception.__init__(self, *args) 

self._line_number = None 

self._line = None 

self._position = kwargs.get('position', None) 

self._format = kwargs.get('format', None) 

self._version_dialect = None 

 

def set_context(self, line_number, line, version_dialect): 

self._line_number = line_number 

self._line = line 

self._version_dialect = version_dialect 

 

def __str__(self): 

lst = [Exception.__str__(self)] 

if self._version_dialect is not None: 

lst.append('format version: %s' % self._version_dialect[0]) 

lst.append('dialect: %s' % self._version_dialect[1]) 

if self._line_number is not None: 

lst.append('line number: %i' % self._line_number) 

if self._line is not None: 

lst.append('line content:\n%s' % (self._line.decode('ascii') or 

'*** line is empty ***')) 

 

if self._position is not None: 

if self._position[1] is None: 

length = max(1, len(self._line or '') - self._position[0]) 

else: 

length = self._position[1] 

 

lst.append(' ' * self._position[0] + '^' * length) 

 

if self._format is not None: 

i = 0 

f = [] 

j = 1 

for element in self._format: 

if element.length != 0: 

f.append(' ' * (element.position - i)) 

if element.length is not None: 

f.append(str(j % 10) * element.length) 

i = element.position + element.length 

else: 

f.append(str(j % 10) + '...') 

i = element.position + 4 

 

j += 1 

 

lst.append(''.join(f)) 

 

return '\n'.join(lst) 

 

 

def float_or_none(x): 

if x.strip(): 

return float(x) 

else: 

return None 

 

 

def int_or_none(x): 

if x.strip(): 

return int(x) 

else: 

return None 

 

 

def float_to_string(fmt): 

ef = fmt[0] 

assert ef in 'ef' 

ln, d = map(int, fmt[1:].split('.')) 

pfmts = ['%%%i.%i%s' % (ln, dsub, ef) for dsub in range(d, -1, -1)] 

blank = b' ' * ln 

 

def func(v): 

if v is None: 

return blank 

 

for pfmt in pfmts: 

s = pfmt % v 

if len(s) == ln: 

return s.encode('ascii') 

 

raise SerializeError('format="%s", value=%s' % (pfmt, repr(v))) 

 

return func 

 

 

def int_to_string(fmt): 

assert fmt[0] == 'i' 

pfmt = '%'+fmt[1:]+'i' 

ln = int(fmt[1:]) 

blank = b' ' * ln 

 

def func(v): 

if v is None: 

return blank 

 

s = pfmt % v 

if len(s) == ln: 

return s.encode('ascii') 

else: 

raise SerializeError('format="%s", value=%s' % (pfmt, repr(v))) 

 

return func 

 

 

def deserialize_string(fmt): 

if fmt.endswith('?'): 

def func(s): 

if s.strip(): 

return str(s.rstrip().decode('ascii')) 

else: 

return None 

else: 

def func(s): 

return str(s.rstrip().decode('ascii')) 

 

return func 

 

 

def serialize_string(fmt): 

if fmt.endswith('+'): 

more_ok = True 

else: 

more_ok = False 

 

fmt = fmt.rstrip('?+') 

 

assert fmt[0] == 'a' 

ln = int(fmt[1:]) 

 

def func(v): 

if v is None: 

v = b'' 

else: 

v = v.encode('ascii') 

 

s = v.ljust(ln) 

if more_ok or len(s) == ln: 

return s 

else: 

raise SerializeError('max string length: %i, value="%s"' % ln, v) 

 

return func 

 

 

def rstrip_string(v): 

return v.rstrip() 

 

 

def x_fixed(expect): 

def func(): 

def parse(s): 

if s != expect: 

raise DeserializeError( 

'expected="%s", value="%s"' % (expect, s)) 

return s 

 

def string(s): 

return expect 

 

return parse, string 

 

func.width = len(expect) 

func.help_type = 'Keyword: %s' % expect 

return func 

 

 

def x_scaled(fmt, factor): 

def func(): 

to_string = float_to_string(fmt) 

 

def parse(s): 

x = float_or_none(s) 

if x is None: 

return None 

else: 

return x * factor 

 

def string(v): 

if v is None: 

return to_string(None) 

else: 

return to_string(v/factor) 

 

return parse, string 

 

func.width = int(fmt[1:].split('.')[0]) 

func.help_type = 'float' 

return func 

 

 

def x_int_angle(): 

def string(v): 

if v is None: 

return b' ' 

else: 

return ('%3i' % (int(round(v)) % 360)).encode('ascii') 

 

return float_or_none, string 

 

 

x_int_angle.width = 3 

x_int_angle.help_type = 'int [0, 360]' 

 

 

def x_substitute(value): 

def func(): 

def parse(s): 

assert s == b'' 

return value 

 

def string(s): 

return b'' 

 

return parse, string 

 

func.width = 0 

func.help_type = 'Not present in this file version.' 

return func 

 

 

def fillup_zeros(s, fmt): 

s = s.rstrip() 

if not s: 

return s 

 

if fmt == '%Y/%m/%d %H:%M:%S.3FRAC': 

return s + '0000/01/01 00:00:00.000'[len(s):] 

elif fmt == '%Y/%m/%d %H:%M:%S.2FRAC': 

return s + '0000/01/01 00:00:00.00'[len(s):] 

 

return s 

 

 

def x_date_time(fmt='%Y/%m/%d %H:%M:%S.3FRAC'): 

def parse(s): 

s = str(s.decode('ascii')) 

try: 

s = fillup_zeros(s, fmt) 

return util.str_to_time(s, format=fmt) 

 

except Exception: 

# iris sets this dummy end dates and they don't fit into 32bit 

# time stamps 

if fmt[:2] == '%Y' and s[:4] in ('2599', '2045'): 

return None 

 

elif fmt[6:8] == '%Y' and s[6:10] in ('2599', '2045'): 

return None 

 

raise DeserializeError('expected date, value="%s"' % s) 

 

def string(s): 

return util.time_to_str(s, format=fmt).encode('ascii') 

 

return parse, string 

 

 

x_date_time.width = 23 

x_date_time.help_type = 'YYYY/MM/DD HH:MM:SS.FFF' 

 

 

def x_date(): 

return x_date_time(fmt='%Y/%m/%d') 

 

 

x_date.width = 10 

x_date.help_type = 'YYYY/MM/DD' 

 

 

def x_date_iris(): 

return x_date_time(fmt='%m/%d/%Y') 

 

 

x_date_iris.width = 10 

x_date_iris.help_type = 'MM/DD/YYYY' 

 

 

def x_date_time_no_seconds(): 

return x_date_time(fmt='%Y/%m/%d %H:%M') 

 

 

x_date_time_no_seconds.width = 16 

x_date_time_no_seconds.help_type = 'YYYY/MM/DD HH:MM' 

 

 

def x_date_time_2frac(): 

return x_date_time(fmt='%Y/%m/%d %H:%M:%S.2FRAC') 

 

 

x_date_time_2frac.width = 22 

x_date_time_2frac.help_type = 'YYYY/MM/DD HH:MM:SS.FF' 

 

 

def x_yesno(): 

def parse(s): 

if s == b'y': 

return True 

elif s == b'n': 

return False 

else: 

raise DeserializeError('"y" on "n" expected') 

 

def string(b): 

return [b'n', b'y'][int(b)] 

 

return parse, string 

 

 

x_yesno.width = 1 

x_yesno.help_type = 'yes/no' 

 

 

def optional(x_func): 

 

def func(): 

parse, string = x_func() 

 

def parse_optional(s): 

if s.strip(): 

return parse(s) 

else: 

return None 

 

def string_optional(s): 

if s is None: 

return b' ' * x_func.width 

else: 

return string(s) 

 

return parse_optional, string_optional 

 

func.width = x_func.width 

func.help_type = 'optional %s' % x_func.help_type 

 

return func 

 

 

class E(object): 

def __init__(self, begin, end, fmt, dummy=False): 

self.advance = 1 

if dummy: 

self.advance = 0 

 

self.position = begin - 1 

if end is not None: 

self.length = end - begin + 1 

else: 

self.length = None 

 

self.end = end 

 

if isinstance(fmt, str): 

t = fmt[0] 

if t in 'ef': 

self.parse = float_or_none 

self.string = float_to_string(fmt) 

ln = int(fmt[1:].split('.')[0]) 

self.help_type = 'float' 

elif t == 'a': 

self.parse = deserialize_string(fmt) 

self.string = serialize_string(fmt) 

ln = int(fmt[1:].rstrip('+?')) 

self.help_type = 'string' 

elif t == 'i': 

self.parse = int_or_none 

self.string = int_to_string(fmt) 

ln = int(fmt[1:]) 

self.help_type = 'integer' 

else: 

assert False, 'invalid format: %s' % t 

 

assert self.length is None or ln == self.length, \ 

'inconsistent length for pos=%i, fmt=%s' \ 

% (self.position, fmt) 

 

else: 

self.parse, self.string = fmt() 

self.help_type = fmt.help_type 

 

 

def end_section(line, extra=None): 

if line is None: 

return True 

 

ul = line.upper() 

return ul.startswith(b'DATA_TYPE') or ul.startswith(b'STOP') or \ 

(extra is not None and ul.startswith(extra)) 

 

 

class Section(Object): 

''' 

Base class for top level sections in IMS/GSE2 files. 

 

Sections as understood by this implementation typically correspond to a 

DATA_TYPE section in IMS/GSE2 but for some types a finer granularity has 

been chosen. 

''' 

 

handlers = {} # filled after section have been defined below 

 

@classmethod 

def read(cls, reader): 

datatype = DataType.read(reader) 

reader.pushback() 

return Section.handlers[ 

datatype.type.upper().encode('ascii')].read(reader) 

 

def write_datatype(self, writer): 

datatype = DataType( 

type=self.keyword.decode('ascii'), 

format=writer.version_dialect[0]) 

datatype.write(writer) 

 

@classmethod 

def read_table(cls, reader, expected_header, block_cls, end=end_section): 

 

header = reader.readline() 

if not header.upper().startswith(expected_header.upper()): 

raise DeserializeError( 

'invalid table header line, expected:\n' 

'%s\nfound: %s ' % (expected_header, header)) 

 

while True: 

line = reader.readline() 

reader.pushback() 

if end(line): 

break 

 

yield block_cls.read(reader) 

 

def write_table(self, writer, header, blocks): 

writer.writeline(header) 

for block in blocks: 

block.write(writer) 

 

 

def get_versioned(x, version_dialect): 

if isinstance(x, dict): 

for v in (tuple(version_dialect), version_dialect[0], None): 

if v in x: 

return x[v] 

else: 

return x 

 

 

class Block(Object): 

''' 

Base class for IMS/GSE2 data blocks / lines. 

 

Blocks as understood by this implementation usually correspond to 

individual logical lines in the IMS/GSE2 file. 

''' 

 

def values(self): 

return list(self.T.ivals(self)) 

 

@classmethod 

def format(cls, version_dialect): 

return get_versioned(cls._format, version_dialect) 

 

def serialize(self, version_dialect): 

ivalue = 0 

out = [] 

values = self.values() 

for element in self.format(version_dialect): 

if element.length != 0: 

out.append((element.position, element.string(values[ivalue]))) 

ivalue += element.advance 

 

out.sort() 

 

i = 0 

slist = [] 

for (position, s) in out: 

slist.append(b' ' * (position - i)) 

slist.append(s) 

i = position + len(s) 

 

return b''.join(slist) 

 

@classmethod 

def deserialize_values(cls, line, version_dialect): 

values = [] 

for element in cls.format(version_dialect): 

try: 

val = element.parse( 

line[element.position:element.end]) 

 

if element.advance != 0: 

values.append(val) 

except Exception: 

raise DeserializeError( 

'Cannot parse %s' % ( 

element.help_type), 

position=(element.position, element.length), 

version=version_dialect[0], 

dialect=version_dialect[1], 

format=cls.format(version_dialect)) 

 

return values 

 

@classmethod 

def validated(cls, *args, **kwargs): 

obj = cls(*args, **kwargs) 

try: 

obj.validate() 

except ValidationError as e: 

raise DeserializeError(str(e)) 

 

return obj 

 

@classmethod 

def regularized(cls, *args, **kwargs): 

obj = cls(*args, **kwargs) 

try: 

obj.regularize() 

except ValidationError as e: 

raise DeserializeError(str(e)) 

 

return obj 

 

@classmethod 

def deserialize(cls, line, version_dialect): 

values = cls.deserialize_values(line, version_dialect) 

return cls.validated(**dict(zip(cls.T.propnames, values))) 

 

@classmethod 

def read(cls, reader): 

line = reader.readline() 

return cls.deserialize(line, reader.version_dialect) 

 

def write(self, writer): 

s = self.serialize(writer.version_dialect) 

writer.writeline(s) 

 

 

class FreeFormatLine(Block): 

''' 

Base class for IMS/GSE2 free format lines. 

''' 

 

@classmethod 

def deserialize_values(cls, line, version_dialect): 

format = cls.format(version_dialect) 

values = line.split(None, len(format)-1) 

 

values_weeded = [] 

for x, v in zip(format, values): 

if isinstance(x, bytes): 

if v.upper() != x: 

raise DeserializeError( 

'expected keyword: %s, found %s' % (x, v.upper())) 

 

else: 

if isinstance(x, tuple): 

x, (parse, _) = x 

v = parse(v) 

 

values_weeded.append((x, v)) 

 

values_weeded.sort() 

return [str(xv[1].decode('ascii')) for xv in values_weeded] 

 

@classmethod 

def deserialize(cls, line, version_dialect): 

values = cls.deserialize_values(line, version_dialect) 

propnames = cls.T.propnames 

stuff = dict(zip(propnames, values)) 

return cls.regularized(**stuff) 

 

def serialize(self, version_dialect): 

names = self.T.propnames 

props = self.T.properties 

out = [] 

for x in self.format(version_dialect): 

if isinstance(x, bytes): 

out.append(x.decode('ascii')) 

else: 

if isinstance(x, tuple): 

x, (_, string) = x 

v = string(getattr(self, names[x-1])) 

else: 

v = getattr(self, names[x-1]) 

 

if v is None: 

break 

 

out.append(props[x-1].to_save(v)) 

 

return ' '.join(out).encode('ascii') 

 

 

class DataType(Block): 

''' 

Representation of a DATA_TYPE line. 

''' 

 

type = String.T() 

subtype = String.T(optional=True) 

format = String.T() 

subformat = String.T(optional=True) 

 

@classmethod 

def deserialize(cls, line, version_dialect): 

pat = br'DATA_TYPE +([^ :]+)(:([^ :]+))?( +([^ :]+)(:([^ :]+))?)?' 

m = re.match(pat, line) 

if not m: 

raise DeserializeError('invalid DATA_TYPE line') 

 

return cls.validated( 

type=str((m.group(1) or b'').decode('ascii')), 

subtype=str((m.group(3) or b'').decode('ascii')), 

format=str((m.group(5) or b'').decode('ascii')), 

subformat=str((m.group(7) or b'').decode('ascii'))) 

 

def serialize(self, version_dialect): 

s = self.type 

if self.subtype: 

s += ':' + self.subtype 

 

f = self.format 

if self.subformat: 

f += ':' + self.subformat 

 

return ('DATA_TYPE %s %s' % (s, f)).encode('ascii') 

 

@classmethod 

def read(cls, reader): 

line = reader.readline() 

datatype = cls.deserialize(line, reader.version_dialect) 

reader.version_dialect[0] = datatype.format 

return datatype 

 

def write(self, writer): 

s = self.serialize(writer.version_dialect) 

writer.version_dialect[0] = self.format 

writer.writeline(s) 

 

 

class FTPFile(FreeFormatLine): 

''' 

Representation of an FTP_FILE line. 

''' 

 

_format = [b'FTP_FILE', 1, 2, 3, 4] 

 

net_address = String.T() 

login_mode = StringChoice.T(choices=('USER', 'GUEST'), ignore_case=True) 

directory = String.T() 

file = String.T() 

 

 

class WaveformSubformat(StringChoice): 

choices = ['INT', 'CM6', 'CM8', 'AU6', 'AU8'] 

ignore_case = True 

 

 

class WID2(Block): 

''' 

Representation of a WID2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'WID2'), dummy=True), 

E(6, 28, x_date_time), 

E(30, 34, 'a5'), 

E(36, 38, 'a3'), 

E(40, 43, 'a4'), 

E(45, 47, 'a3'), 

E(49, 56, 'i8'), 

E(58, 68, 'f11.6'), 

E(70, 79, x_scaled('e10.2', nm_per_s)), 

E(81, 87, 'f7.3'), 

E(89, 94, 'a6?'), 

E(96, 100, 'f5.1'), 

E(102, 105, 'f4.1') 

] 

 

time = Timestamp.T() 

station = String.T(help='station code (5 characters)') 

channel = String.T(help='channel code (3 characters)') 

location = String.T( 

default='', optional=True, 

help='location code (aux_id, 4 characters)') 

sub_format = WaveformSubformat.T(default='CM6') 

nsamples = Int.T(default=0) 

sample_rate = Float.T(default=1.0) 

calibration_factor = Float.T( 

optional=True, 

help='system sensitivity (m/count) at reference period ' 

'(calibration_period)') 

calibration_period = Float.T( 

optional=True, 

help='calibration reference period [s]') 

instrument_type = String.T( 

default='', optional=True, help='instrument type (6 characters)') 

horizontal_angle = Float.T( 

optional=True, 

help='horizontal orientation of sensor, clockwise from north [deg]') 

vertical_angle = Float.T( 

optional=True, 

help='vertical orientation of sensor from vertical [deg]') 

 

 

class OUT2(Block): 

''' 

Representation of an OUT2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'OUT2'), dummy=True), 

E(6, 28, x_date_time), 

E(30, 34, 'a5'), 

E(36, 38, 'a3'), 

E(40, 43, 'a4'), 

E(45, 55, 'f11.3') 

] 

 

time = Timestamp.T() 

station = String.T(help='station code (5 characters)') 

channel = String.T(help='channel code (3 characters)') 

location = String.T( 

default='', optional=True, 

help='location code (aux_id, 4 characters)') 

duration = Float.T() 

 

 

class DLY2(Block): 

''' 

Representation of a DLY2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'DLY2'), dummy=True), 

E(6, 28, x_date_time), 

E(30, 34, 'a5'), 

E(36, 38, 'a3'), 

E(40, 43, 'a4'), 

E(45, 55, 'f11.3') 

] 

 

time = Timestamp.T() 

station = String.T(help='station code (5 characters)') 

channel = String.T(help='channel code (3 characters)') 

location = String.T( 

default='', optional=True, 

help='location code (aux_id, 4 characters)') 

queue_duration = Float.T(help='duration of queue [s]') 

 

 

class DAT2(Block): 

''' 

Representation of a DAT2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'DAT2'), dummy=True) 

] 

 

raw_data = List.T(String.T()) 

 

@classmethod 

def read(cls, reader): 

line = reader.readline() 

dat2 = cls.deserialize(line, reader.version_dialect) 

while True: 

line = reader.readline() 

if line.upper().startswith(b'CHK2 '): 

reader.pushback() 

break 

else: 

if reader._load_data: 

dat2.raw_data.append(line.strip()) 

 

return dat2 

 

def write(self, writer): 

Block.write(self, writer) 

for line in self.raw_data: 

writer.writeline(line) 

 

 

class STA2(Block): 

''' 

Representation of a STA2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'STA2'), dummy=True), 

E(6, 14, 'a9'), 

E(16, 24, 'f9.5'), 

E(26, 35, 'f10.5'), 

E(37, 48, 'a12'), 

E(50, 54, x_scaled('f5.3', km)), 

E(56, 60, x_scaled('f5.3', km)) 

] 

 

# the standard requires lat, lon, elevation and depth, we define them as 

# optional, however 

 

network = String.T(help='network code (9 characters)') 

lat = Float.T(optional=True) 

lon = Float.T(optional=True) 

coordinate_system = String.T(default='WGS-84') 

elevation = Float.T(optional=True, help='elevation [m]') 

depth = Float.T(optional=True, help='emplacement depth [m]') 

 

 

class CHK2(Block): 

''' 

Representation of a CHK2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'CHK2'), dummy=True), 

E(6, 13, 'i8') 

] 

 

checksum = Int.T() 

 

 

class EID2(Block): 

''' 

Representation of an EID2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'EID2'), dummy=True), 

E(6, 13, 'a8'), 

E(15, 23, 'a9'), 

] 

 

event_id = String.T(help='event ID (8 characters)') 

bulletin_type = String.T(help='bulletin type (9 characters)') 

 

 

class BEA2(Block): 

''' 

Representation of a BEA2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'BEA2'), dummy=True), 

E(6, 17, 'a12'), 

E(19, 23, 'f5.1'), 

E(25, 29, 'f5.1')] 

 

beam_id = String.T(help='beam ID (12 characters)') 

azimuth = Float.T() 

slowness = Float.T() 

 

 

class Network(Block): 

''' 

Representation of an entry in a NETWORK section. 

''' 

 

_format = [ 

E(1, 9, 'a9'), 

E(11, None, 'a64+')] 

 

network = String.T(help='network code (9 characters)') 

description = String.T(help='description') 

 

 

class Station(Block): 

''' 

Representation of an entry in a STATION section. 

''' 

 

_format = { 

None: [ 

E(1, 9, 'a9'), 

E(11, 15, 'a5'), 

E(17, 20, 'a4'), 

E(22, 30, 'f9.5'), 

E(32, 41, 'f10.5'), 

E(43, 54, 'a12'), 

E(56, 60, x_scaled('f5.3', km)), 

E(62, 71, x_date), 

E(73, 82, optional(x_date)) 

], 

'GSE2.0': [ 

E(0, -1, x_substitute('')), 

E(1, 5, 'a5'), 

E(7, 10, 'a4'), 

E(12, 20, 'f9.5'), 

E(22, 31, 'f10.5'), 

E(32, 31, x_substitute('WGS-84')), 

E(33, 39, x_scaled('f7.3', km)), 

E(41, 50, x_date), 

E(52, 61, optional(x_date))]} 

 

_format['IMS1.0', 'USA_DMC'] = list(_format[None]) 

_format['IMS1.0', 'USA_DMC'][-2:] = [ 

E(62, 71, x_date_iris), 

E(73, 82, optional(x_date_iris))] 

 

network = String.T(help='network code (9 characters)') 

station = String.T(help='station code (5 characters)') 

type = String.T( 

help='station type (4 characters) ' 

'(1C: single component, 3C: three-component, ' 

'hfa: high frequency array, lpa: long period array)') 

lat = Float.T() 

lon = Float.T() 

coordinate_system = String.T(default='WGS-84') 

elevation = Float.T(help='elevation [m]') 

tmin = Timestamp.T() 

tmax = Timestamp.T(optional=True) 

 

 

class Channel(Block): 

''' 

Representation of an entry in a CHANNEL section. 

''' 

 

_format = { 

None: [ 

E(1, 9, 'a9'), 

E(11, 15, 'a5'), 

E(17, 19, 'a3'), 

E(21, 24, 'a4'), 

E(26, 34, 'f9.5'), 

E(36, 45, 'f10.5'), 

E(47, 58, 'a12'), 

E(60, 64, x_scaled('f5.3', km)), 

E(66, 70, x_scaled('f5.3', km)), 

E(72, 77, 'f6.1'), 

E(79, 83, 'f5.1'), 

E(85, 95, 'f11.6'), 

E(97, 102, 'a6'), 

E(105, 114, x_date), 

E(116, 125, optional(x_date))], 

'GSE2.0': [ 

E(0, -1, x_substitute('')), 

E(1, 5, 'a5'), 

E(7, 9, 'a3'), 

E(11, 14, 'a4'), 

E(16, 24, 'f9.5'), 

E(26, 35, 'f10.5'), 

E(32, 31, x_substitute('WGS-84')), 

E(37, 43, x_scaled('f7.3', km)), 

E(45, 50, x_scaled('f6.3', km)), 

E(52, 57, 'f6.1'), 

E(59, 63, 'f5.1'), 

E(65, 75, 'f11.6'), 

E(77, 83, 'a7'), 

E(85, 94, x_date), 

E(96, 105, optional(x_date))]} 

 

# norsar plays its own game... 

_format['GSE2.0', 'NOR_NDC'] = list(_format['GSE2.0']) 

_format['GSE2.0', 'NOR_NDC'][-2:] = [ 

E(85, 100, x_date_time_no_seconds), 

E(102, 117, optional(x_date_time_no_seconds))] 

 

# also iris plays its own game... 

_format['IMS1.0', 'USA_DMC'] = list(_format[None]) 

_format['IMS1.0', 'USA_DMC'][-2:] = [ 

E(105, 114, x_date_iris), 

E(116, 125, optional(x_date_iris))] 

 

network = String.T(help='network code (9 characters)') 

station = String.T(help='station code (5 characters)') 

channel = String.T(help='channel code (3 characters)') 

location = String.T( 

default='', optional=True, 

help='location code (aux_id, 4 characters)') 

lat = Float.T(optional=True) 

lon = Float.T(optional=True) 

coordinate_system = String.T(default='WGS-84') 

elevation = Float.T(optional=True, help='elevation [m]') 

depth = Float.T(optional=True, help='emplacement depth [m]') 

horizontal_angle = Float.T( 

optional=True, 

help='horizontal orientation of sensor, clockwise from north [deg]') 

vertical_angle = Float.T( 

optional=True, 

help='vertical orientation of sensor from vertical [deg]') 

sample_rate = Float.T() 

instrument_type = String.T( 

default='', optional=True, help='instrument type (6 characters)') 

tmin = Timestamp.T() 

tmax = Timestamp.T(optional=True) 

 

 

class BeamGroup(Block): 

''' 

Representation of an entry in a BEAM group table. 

''' 

 

_format = [ 

E(1, 8, 'a8'), 

E(10, 14, 'a5'), 

E(16, 18, 'a3'), 

E(20, 23, 'a4'), 

E(25, 27, 'i3'), 

E(29, 37, 'f9.5')] 

 

beam_group = String.T(help='beam group (8 characters)') 

station = String.T(help='station code (5 characters)') 

channel = String.T(help='channel code (3 characters)') 

location = String.T( 

default='', optional=True, 

help='location code (aux_id, 4 characters)') 

weight = Int.T( 

optional=True, 

help='weight used for this component when the beam was formed') 

delay = Float.T( 

optional=True, 

help='beam delay for this component [s] ' 

'(used for meabs formed by non-plane waves)') 

 

 

class BeamType(StringChoice): 

choices = ['inc', 'coh'] 

ignore_case = True 

 

 

class FilterType(StringChoice): 

choices = ['BP', 'LP', 'HP', 'BR'] 

ignore_case = True 

 

 

class BeamParameters(Block): 

''' 

Representation of an entry in a BEAM parameters table. 

''' 

 

_format = [ 

E(1, 12, 'a12'), 

E(14, 21, 'a8'), 

E(23, 25, 'a3'), 

E(27, 27, x_yesno), 

E(29, 33, 'f5.1'), 

E(35, 39, 'f5.3'), # standard says f5.1 -999.0 is vertical beam 

E(41, 48, 'a8'), 

E(50, 55, 'f6.2'), 

E(57, 62, 'f6.2'), 

E(64, 65, 'i2'), 

E(67, 67, x_yesno), 

E(69, 70, 'a2'), 

E(72, 81, x_date), 

E(83, 92, optional(x_date))] 

 

beam_id = String.T() 

beam_group = String.T() 

type = BeamType.T() 

is_rotated = Bool.T(help='rotation flag') 

azimuth = Float.T( 

help='azimuth used to steer the beam [deg] (clockwise from North)') 

slowness = Float.T( 

help='slowness used to steer the beam [s/deg]') 

phase = String.T( 

help='phase used to set the beam slowness for origin-based beams ' 

'(8 characters)') 

filter_fmin = Float.T( 

help='low frequency cut-off for the beam filter [Hz]') 

filter_fmax = Float.T( 

help='high frequency cut-off for the beam filter [Hz]') 

filter_order = Int.T( 

help='order of the beam filter') 

filter_is_zero_phase = Bool.T( 

help='flag to indicate zero-phase filtering') 

filter_type = FilterType.T( 

help='type of filtering') 

tmin = Timestamp.T( 

help='start date of beam use') 

tmax = Timestamp.T( 

optional=True, 

help='end date of beam use') 

 

 

class OutageReportPeriod(Block): 

''' 

Representation of a the report period of an OUTAGE section. 

''' 

 

_format = [ 

E(1, 18, x_fixed(b'Report period from'), dummy=True), 

E(20, 42, x_date_time), 

E(44, 45, x_fixed(b'to'), dummy=True), 

E(47, 69, x_date_time)] 

 

tmin = Timestamp.T() 

tmax = Timestamp.T() 

 

 

class Outage(Block): 

''' 

Representation of an entry in the OUTAGE section table. 

''' 

_format = [ 

E(1, 9, 'a9'), 

E(11, 15, 'a5'), 

E(17, 19, 'a3'), 

E(21, 24, 'a4'), 

E(26, 48, x_date_time), 

E(50, 72, x_date_time), 

E(74, 83, 'f10.3'), 

E(85, None, 'a48+')] 

 

network = String.T(help='network code (9 characters)') 

station = String.T(help='station code (5 characters)') 

channel = String.T(help='channel code (3 characters)') 

location = String.T( 

default='', optional=True, 

help='location code (aux_id, 4 characters)') 

tmin = Timestamp.T() 

tmax = Timestamp.T() 

duration = Float.T() 

comment = String.T() 

 

 

class CAL2(Block): 

''' 

Representation of a CAL2 line. 

''' 

 

_format = { 

None: [ 

E(1, 4, x_fixed(b'CAL2'), dummy=True), 

E(6, 10, 'a5'), 

E(12, 14, 'a3'), 

E(16, 19, 'a4'), 

E(21, 26, 'a6'), 

E(28, 42, x_scaled('e15.8', nm_per_s)), # standard: e15.2 

E(44, 50, 'f7.3'), 

E(52, 62, 'f11.5'), 

E(64, 79, x_date_time_no_seconds), 

E(81, 96, optional(x_date_time_no_seconds))], 

'GSE2.0': [ 

E(1, 4, x_fixed(b'CAL2'), dummy=True), 

E(6, 10, 'a5'), 

E(12, 14, 'a3'), 

E(16, 19, 'a4'), 

E(21, 26, 'a6'), 

E(28, 37, x_scaled('e10.4', nm_per_s)), 

E(39, 45, 'f7.3'), 

E(47, 56, 'f10.5'), 

E(58, 73, x_date_time_no_seconds), 

E(75, 90, optional(x_date_time_no_seconds))]} 

 

station = String.T(help='station code (5 characters)') 

channel = String.T(help='channel code (3 characters)') 

location = String.T( 

default='', optional=True, 

help='location code (aux_id, 4 characters)') 

instrument_type = String.T( 

default='', optional=True, help='instrument type (6 characters)') 

calibration_factor = Float.T( 

help='system sensitivity (m/count) at reference period ' 

'(calibration_period)') 

calibration_period = Float.T(help='calibration reference period [s]') 

sample_rate = Float.T(help='system output sample rate [Hz]') 

tmin = Timestamp.T(help='effective start date and time') 

tmax = Timestamp.T(optional=True, help='effective end date and time') 

comments = List.T(String.T(optional=True)) 

 

@classmethod 

def read(cls, reader): 

lstart = reader.current_line_number() 

line = reader.readline() 

obj = cls.deserialize(line, reader.version_dialect) 

while True: 

line = reader.readline() 

# make sure all comments are read 

if line is None or not line.startswith(b' '): 

reader.pushback() 

break 

 

obj.append_dataline(line, reader.version_dialect) 

 

obj.comments.extend(reader.get_comments_after(lstart)) 

return obj 

 

def write(self, writer): 

s = self.serialize(writer.version_dialect) 

writer.writeline(s) 

for c in self.comments: 

writer.writeline((' (%s)' % c).encode('ascii')) 

 

 

class Units(StringChoice): 

choices = ['V', 'A', 'C'] 

ignore_case = True 

 

 

class Stage(Block): 

''' 

Base class for IMS/GSE2 response stages. 

 

Available response stages are :py:class:`PAZ2`, :py:class:`FAP2`, 

:py:class:`GEN2`, :py:class:`DIG2`, and :py:class:`FIR2`. 

 

''' 

 

stage_number = Int.T(help='stage sequence number') 

 

@classmethod 

def read(cls, reader): 

lstart = reader.current_line_number() 

line = reader.readline() 

obj = cls.deserialize(line, reader.version_dialect) 

 

while True: 

line = reader.readline() 

if line is None or not line.startswith(b' '): 

reader.pushback() 

break 

 

obj.append_dataline(line, reader.version_dialect) 

 

obj.comments.extend(reader.get_comments_after(lstart)) 

 

return obj 

 

def write(self, writer): 

line = self.serialize(writer.version_dialect) 

writer.writeline(line) 

self.write_datalines(writer) 

for c in self.comments: 

writer.writeline((' (%s)' % c).encode('ascii')) 

 

def write_datalines(self, writer): 

pass 

 

 

class PAZ2Data(Block): 

''' 

Representation of the complex numbers in PAZ2 sections. 

''' 

 

_format = [ 

E(2, 16, 'e15.8'), 

E(18, 32, 'e15.8')] 

 

real = Float.T() 

imag = Float.T() 

 

 

class PAZ2(Stage): 

''' 

Representation of a PAZ2 line. 

''' 

 

_format = { 

None: [ 

E(1, 4, x_fixed(b'PAZ2'), dummy=True), 

E(6, 7, 'i2'), 

E(9, 9, 'a1'), 

E(11, 25, 'e15.8'), 

E(27, 30, 'i4'), 

E(32, 39, 'f8.3'), 

E(41, 43, 'i3'), 

E(45, 47, 'i3'), 

E(49, None, 'a25+')], 

('IMS1.0', 'USA_DMC'): [ 

E(1, 4, x_fixed(b'PAZ2'), dummy=True), 

E(6, 7, 'i2'), 

E(9, 9, 'a1'), 

E(11, 25, 'e15.8'), 

E(27, 30, 'i4'), 

E(32, 39, 'f8.3'), 

E(40, 42, 'i3'), 

E(44, 46, 'i3'), 

E(48, None, 'a25+')]} 

 

output_units = Units.T( 

help='output units code (V=volts, A=amps, C=counts)') 

scale_factor = Float.T(help='scale factor [ouput units/input units]') 

decimation = Int.T(optional=True, help='decimation') 

correction = Float.T(optional=True, help='group correction applied [s]') 

npoles = Int.T(help='number of poles') 

nzeros = Int.T(help='number of zeros') 

description = String.T(default='', optional=True, help='description') 

 

poles = List.T(Complex.T()) 

zeros = List.T(Complex.T()) 

 

comments = List.T(String.T(optional=True)) 

 

def append_dataline(self, line, version_dialect): 

d = PAZ2Data.deserialize(line, version_dialect) 

v = complex(d.real, d.imag) 

i = len(self.poles) + len(self.zeros) 

 

if i < self.npoles: 

self.poles.append(v) 

elif i < self.npoles + self.nzeros: 

self.zeros.append(v) 

else: 

raise DeserializeError( 

'more poles and zeros than expected') 

 

def write_datalines(self, writer): 

for pole in self.poles: 

PAZ2Data(real=pole.real, imag=pole.imag).write(writer) 

for zero in self.zeros: 

PAZ2Data(real=zero.real, imag=zero.imag).write(writer) 

 

 

class FAP2Data(Block): 

''' 

Representation of the data tuples in FAP2 section. 

''' 

 

_format = [ 

E(2, 11, 'f10.5'), 

E(13, 27, 'e15.8'), 

E(29, 32, 'i4')] 

 

frequency = Float.T() 

amplitude = Float.T() 

phase = Float.T() 

 

 

class FAP2(Stage): 

''' 

Representation of a FAP2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'FAP2'), dummy=True), 

E(6, 7, 'i2'), 

E(9, 9, 'a1'), 

E(11, 14, 'i4'), 

E(16, 23, 'f8.3'), 

E(25, 27, 'i3'), 

E(29, 53, 'a25')] 

 

output_units = Units.T( 

help='output units code (V=volts, A=amps, C=counts)') 

decimation = Int.T(optional=True, help='decimation') 

correction = Float.T(help='group correction applied [s]') 

ntrip = Int.T(help='number of frequency, amplitude, phase triplets') 

description = String.T(default='', optional=True, help='description') 

 

frequencies = List.T(Float.T(), help='frequency [Hz]') 

amplitudes = List.T( 

Float.T(), help='amplitude [input untits/output units]') 

phases = List.T(Float.T(), help='phase delay [degrees]') 

 

comments = List.T(String.T(optional=True)) 

 

def append_dataline(self, line, version_dialect): 

d = FAP2Data.deserialize(line, version_dialect) 

self.frequencies.append(d.frequency) 

self.amplitudes.append(d.amplitude) 

self.phases.append(d.phase) 

 

def write_datalines(self, writer): 

for frequency, amplitude, phase in zip( 

self.frequencies, self.amplitudes, self.phases): 

 

FAP2Data( 

frequency=frequency, 

amplitude=amplitude, 

phase=phase).write(writer) 

 

 

class GEN2Data(Block): 

''' 

Representation of a data tuple in GEN2 section. 

''' 

 

_format = [ 

E(2, 12, 'f11.5'), 

E(14, 19, 'f6.3')] 

 

corner = Float.T(help='corner frequency [Hz]') 

slope = Float.T(help='slope above corner [dB/decate]') 

 

 

class GEN2(Stage): 

''' 

Representation of a GEN2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'GEN2'), dummy=True), 

E(6, 7, 'i2'), 

E(9, 9, 'a1'), 

E(11, 25, x_scaled('e15.8', nm_per_s)), 

E(27, 33, 'f7.3'), 

E(35, 38, 'i4'), 

E(40, 47, 'f8.3'), 

E(49, 51, 'i3'), 

E(53, 77, 'a25')] 

 

output_units = Units.T( 

help='output units code (V=volts, A=amps, C=counts)') 

calibration_factor = Float.T( 

help='system sensitivity (m/count) at reference period ' 

'(calibration_period)') 

calibration_period = Float.T(help='calibration reference period [s]') 

decimation = Int.T(optional=True, help='decimation') 

correction = Float.T(help='group correction applied [s]') 

ncorners = Int.T(help='number of corners') 

description = String.T(default='', optional=True, help='description') 

 

corners = List.T(Float.T(), help='corner frequencies [Hz]') 

slopes = List.T(Float.T(), help='slopes above corners [dB/decade]') 

 

comments = List.T(String.T(optional=True)) 

 

def append_dataline(self, line, version_dialect): 

d = GEN2Data.deserialize(line, version_dialect) 

self.corners.append(d.corner) 

self.slopes.append(d.slope) 

 

def write_datalines(self, writer): 

for corner, slope in zip(self.corners, self.slopes): 

GEN2Data(corner=corner, slope=slope).write(writer) 

 

 

class DIG2(Stage): 

''' 

Representation of a DIG2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'DIG2'), dummy=True), 

E(6, 7, 'i2'), 

E(9, 23, 'e15.8'), 

E(25, 35, 'f11.5'), 

E(37, None, 'a25+')] 

 

sensitivity = Float.T(help='sensitivity [counts/input units]') 

sample_rate = Float.T(help='digitizer sample rate [Hz]') 

description = String.T(default='', optional=True, help='description') 

 

comments = List.T(String.T(optional=True)) 

 

 

class SymmetryFlag(StringChoice): 

choices = ['A', 'B', 'C'] 

ignore_case = True 

 

 

class FIR2Data(Block): 

''' 

Representation of a line of coefficients in a FIR2 section. 

''' 

 

_format = [ 

E(2, 16, 'e15.8'), 

E(18, 32, 'e15.8'), 

E(34, 48, 'e15.8'), 

E(50, 64, 'e15.8'), 

E(66, 80, 'e15.8')] 

 

factors = List.T(Float.T()) 

 

def values(self): 

return self.factors + [None]*(5-len(self.factors)) 

 

@classmethod 

def deserialize(cls, line, version_dialect): 

factors = [v for v in cls.deserialize_values(line, version_dialect) 

if v is not None] 

return cls.validated(factors=factors) 

 

 

class FIR2(Stage): 

''' 

Representation of a FIR2 line. 

''' 

 

_format = [ 

E(1, 4, x_fixed(b'FIR2'), dummy=True), 

E(6, 7, 'i2'), 

E(9, 18, 'e10.2'), 

E(20, 23, 'i4'), 

E(25, 32, 'f8.3'), 

E(34, 34, 'a1'), 

E(36, 39, 'i4'), 

E(41, None, 'a25+')] 

 

gain = Float.T(help='filter gain (relative factor, not in dB)') 

decimation = Int.T(optional=True, help='decimation') 

correction = Float.T(help='group correction applied [s]') 

symmetry = SymmetryFlag.T( 

help='symmetry flag (A=asymmetric, B=symmetric (odd), ' 

'C=symmetric (even))') 

nfactors = Int.T(help='number of factors') 

description = String.T(default='', optional=True, help='description') 

 

comments = List.T(String.T(optional=True)) 

 

factors = List.T(Float.T()) 

 

def append_dataline(self, line, version_dialect): 

d = FIR2Data.deserialize(line, version_dialect) 

self.factors.extend(d.factors) 

 

def write_datalines(self, writer): 

i = 0 

while i < len(self.factors): 

FIR2Data(factors=self.factors[i:i+5]).write(writer) 

i += 5 

 

 

class Begin(FreeFormatLine): 

''' 

Representation of a BEGIN line. 

''' 

 

_format = [b'BEGIN', 1] 

version = String.T(optional=True) 

 

@classmethod 

def read(cls, reader): 

line = reader.readline() 

obj = cls.deserialize(line, reader.version_dialect) 

reader.version_dialect[0] = obj.version 

return obj 

 

def write(self, writer): 

FreeFormatLine.write(self, writer) 

writer.version_dialect[0] = self.version 

 

 

class MessageType(StringChoice): 

choices = ['REQUEST', 'DATA', 'SUBSCRIPTION'] 

ignore_case = True 

 

 

class MsgType(FreeFormatLine): 

_format = [b'MSG_TYPE', 1] 

type = MessageType.T() 

 

 

class MsgID(FreeFormatLine): 

''' 

Representation of a MSG_ID line. 

''' 

 

_format = [b'MSG_ID', 1, 2] 

msg_id_string = String.T() 

msg_id_source = String.T(optional=True) 

 

@classmethod 

def read(cls, reader): 

line = reader.readline() 

obj = cls.deserialize(line, reader.version_dialect) 

if obj.msg_id_source in g_dialects: 

reader.version_dialect[1] = obj.msg_id_source 

 

return obj 

 

def write(self, writer): 

FreeFormatLine.write(self, writer) 

if self.msg_id_source in g_dialects: 

writer.version_dialect[1] = self.msg_id_source 

 

 

class RefID(FreeFormatLine): 

''' 

Representation of a REF_ID line. 

''' 

 

_format = { 

None: [b'REF_ID', 1, 2, 'PART', 3, 'OF', 4], 

'GSE2.0': [b'REF_ID', 1]} 

 

msg_id_string = String.T() 

msg_id_source = String.T(optional=True) 

sequence_number = Int.T(optional=True) 

total_number = Int.T(optional=True) 

 

def serialize(self, version_dialect): 

out = ['REF_ID', self.msg_id_string] 

if self.msg_id_source: 

out.append(self.msg_id_source) 

i = self.sequence_number 

n = self.total_number 

if i is not None and n is not None: 

out.extend(['PART', str(i), 'OF', str(n)]) 

 

return ' '.join(out).encode('ascii') 

 

 

class LogSection(Section): 

''' 

Representation of a DATA_TYPE LOG section. 

''' 

 

keyword = b'LOG' 

lines = List.T(String.T()) 

 

@classmethod 

def read(cls, reader): 

DataType.read(reader) 

lines = [] 

while True: 

line = reader.readline() 

if end_section(line): 

reader.pushback() 

break 

else: 

lines.append(str(line.decode('ascii'))) 

 

return cls(lines=lines) 

 

def write(self, writer): 

self.write_datatype(writer) 

for line in self.lines: 

ul = line.upper() 

if ul.startswith('DATA_TYPE') or ul.startswith('STOP'): 

line = ' ' + line 

 

writer.writeline(str.encode(line)) 

 

 

class ErrorLogSection(LogSection): 

''' 

Representation of a DATA_TYPE ERROR_LOG section. 

''' 

 

keyword = b'ERROR_LOG' 

 

 

class FTPLogSection(Section): 

''' 

Representation of a DATA_TYPE FTP_LOG section. 

''' 

 

keyword = b'FTP_LOG' 

ftp_file = FTPFile.T() 

 

@classmethod 

def read(cls, reader): 

DataType.read(reader) 

ftp_file = FTPFile.read(reader) 

return cls(ftp_file=ftp_file) 

 

def write(self, writer): 

self.write_datatype(writer) 

self.ftp_file.write(writer) 

 

 

class WID2Section(Section): 

''' 

Representation of a WID2/STA2/EID2/BEA2/DAT2/CHK2 group. 

''' 

 

wid2 = WID2.T() 

sta2 = STA2.T(optional=True) 

eid2s = List.T(EID2.T()) 

bea2 = BEA2.T(optional=True) 

dat2 = DAT2.T() 

chk2 = CHK2.T() 

 

@classmethod 

def read(cls, reader): 

blocks = dict(eid2s=[]) 

expect = [(b'WID2 ', WID2, 1)] 

 

if reader.version_dialect[0] == 'GSE2.0': 

# should not be there in GSE2.0, but BGR puts it there 

expect.append((b'STA2 ', STA2, 0)) 

else: 

expect.append((b'STA2 ', STA2, 1)) 

 

expect.extend([ 

(b'EID2 ', EID2, 0), 

(b'BEA2 ', BEA2, 0), 

(b'DAT2', DAT2, 1), 

(b'CHK2 ', CHK2, 1)]) 

 

for k, handler, required in expect: 

line = reader.readline() 

reader.pushback() 

 

if line is None: 

raise DeserializeError('incomplete waveform section') 

 

if line.upper().startswith(k): 

block = handler.read(reader) 

if k == b'EID2 ': 

blocks['eid2s'].append(block) 

else: 

blocks[str(k.lower().rstrip().decode('ascii'))] = block 

else: 

if required: 

raise DeserializeError('expected %s block' % k) 

else: 

continue 

 

return cls(**blocks) 

 

def write(self, writer): 

self.wid2.write(writer) 

if self.sta2: 

self.sta2.write(writer) 

for eid2 in self.eid2s: 

eid2.write(writer) 

if self.bea2: 

self.bea2.write(writer) 

 

self.dat2.write(writer) 

self.chk2.write(writer) 

 

def pyrocko_trace(self, checksum_error='raise'): 

from pyrocko import ims_ext, trace 

assert checksum_error in ('raise', 'warn', 'ignore') 

 

raw_data = self.dat2.raw_data 

nsamples = self.wid2.nsamples 

deltat = 1.0 / self.wid2.sample_rate 

tmin = self.wid2.time 

if self.sta2: 

net = self.sta2.network 

else: 

net = '' 

sta = self.wid2.station 

loc = self.wid2.location 

cha = self.wid2.channel 

 

if raw_data: 

ydata = ims_ext.decode_cm6(b''.join(raw_data), nsamples) 

if checksum_error != 'ignore': 

if ims_ext.checksum(ydata) != self.chk2.checksum: 

mess = 'computed checksum value differs from stored value' 

if checksum_error == 'raise': 

raise DeserializeError(mess) 

elif checksum_error == 'warn': 

logger.warning(mess) 

 

tmax = None 

else: 

tmax = tmin + (nsamples - 1) * deltat 

ydata = None 

 

return trace.Trace( 

net, sta, loc, cha, tmin=tmin, tmax=tmax, 

deltat=deltat, 

ydata=ydata) 

 

@classmethod 

def from_pyrocko_trace(cls, tr, 

lat=None, lon=None, elevation=None, depth=None): 

 

from pyrocko import ims_ext 

ydata = tr.get_ydata() 

raw_data = ims_ext.encode_cm6(ydata) 

return cls( 

wid2=WID2( 

nsamples=tr.data_len(), 

sample_rate=1.0 / tr.deltat, 

time=tr.tmin, 

station=tr.station, 

location=tr.location, 

channel=tr.channel), 

sta2=STA2( 

network=tr.network, 

lat=lat, 

lon=lon, 

elevation=elevation, 

depth=depth), 

dat2=DAT2( 

raw_data=[raw_data[i*80:(i+1)*80] 

for i in range((len(raw_data)-1)//80 + 1)]), 

chk2=CHK2( 

checksum=ims_ext.checksum(ydata))) 

 

 

class OUT2Section(Section): 

''' 

Representation of a OUT2/STA2 group. 

''' 

 

out2 = OUT2.T() 

sta2 = STA2.T() 

 

@classmethod 

def read(cls, reader): 

out2 = OUT2.read(reader) 

line = reader.readline() 

reader.pushback() 

if line.startswith(b'STA2'): 

# the spec sais STA2 is mandatory but in practice, it is not 

# always there... 

sta2 = STA2.read(reader) 

else: 

sta2 = None 

 

return cls(out2=out2, sta2=sta2) 

 

def write(self, writer): 

self.out2.write(writer) 

if self.sta2 is not None: 

self.sta2.write(writer) 

 

 

class DLY2Section(Section): 

''' 

Representation of a DLY2/STA2 group. 

''' 

 

dly2 = DLY2.T() 

sta2 = STA2.T() 

 

@classmethod 

def read(cls, reader): 

dly2 = DLY2.read(reader) 

sta2 = STA2.read(reader) 

return cls(dly2=dly2, sta2=sta2) 

 

def write(self, writer): 

self.dly2.write(writer) 

self.sta2.write(writer) 

 

 

class WaveformSection(Section): 

''' 

Representation of a DATA_TYPE WAVEFORM line. 

 

Any subsequent WID2/OUT2/DLY2 groups are handled as indepenent sections, so 

this type just serves as a dummy to read/write the DATA_TYPE WAVEFORM 

header. 

''' 

 

keyword = b'WAVEFORM' 

 

datatype = DataType.T() 

 

@classmethod 

def read(cls, reader): 

datatype = DataType.read(reader) 

return cls(datatype=datatype) 

 

def write(self, writer): 

self.datatype.write(writer) 

 

 

class TableSection(Section): 

''' 

Base class for table style sections. 

''' 

 

has_data_type_header = True 

 

@classmethod 

def read(cls, reader): 

if cls.has_data_type_header: 

DataType.read(reader) 

 

ts = cls.table_setup 

 

header = get_versioned(ts['header'], reader.version_dialect) 

blocks = list(cls.read_table( 

reader, header, ts['cls'], end=ts.get('end', end_section))) 

return cls(**{ts['attribute']: blocks}) 

 

def write(self, writer): 

if self.has_data_type_header: 

self.write_datatype(writer) 

 

ts = self.table_setup 

header = get_versioned(ts['header'], writer.version_dialect) 

self.write_table(writer, header, getattr(self, ts['attribute'])) 

 

 

class NetworkSection(TableSection): 

''' 

Representation of a DATA_TYPE NETWORK section. 

''' 

 

keyword = b'NETWORK' 

table_setup = dict( 

header=b'Net Description', 

attribute='networks', 

cls=Network) 

 

networks = List.T(Network.T()) 

 

 

class StationSection(TableSection): 

''' 

Representation of a DATA_TYPE STATION section. 

''' 

 

keyword = b'STATION' 

table_setup = dict( 

header={ 

None: ( 

b'Net Sta Type Latitude Longitude Coord ' 

b'Sys Elev On Date Off Date'), 

'GSE2.0': ( 

b'Sta Type Latitude Longitude Elev On Date ' 

b'Off Date')}, 

attribute='stations', 

cls=Station) 

 

stations = List.T(Station.T()) 

 

 

class ChannelSection(TableSection): 

''' 

Representation of a DATA_TYPE CHANNEL section. 

''' 

 

keyword = b'CHANNEL' 

table_setup = dict( 

header={ 

None: ( 

b'Net Sta Chan Aux Latitude Longitude Coord Sys' 

b' Elev Depth Hang Vang Sample Rate Inst ' 

b'On Date Off Date'), 

'GSE2.0': ( 

b'Sta Chan Aux Latitude Longitude ' 

b'Elev Depth Hang Vang Sample_Rate Inst ' 

b'On Date Off Date')}, 

attribute='channels', 

cls=Channel) 

 

channels = List.T(Channel.T()) 

 

 

class BeamSection(Section): 

''' 

Representation of a DATA_TYPE BEAM section. 

''' 

 

keyword = b'BEAM' 

beam_group_header = b'Bgroup Sta Chan Aux Wgt Delay' 

beam_parameters_header = b'BeamID Bgroup Btype R Azim Slow '\ 

b'Phase Flo Fhi O Z F '\ 

b'On Date Off Date' 

group = List.T(BeamGroup.T()) 

parameters = List.T(BeamParameters.T()) 

 

@classmethod 

def read(cls, reader): 

DataType.read(reader) 

 

def end(line): 

return line.upper().startswith(b'BEAMID') 

 

group = list(cls.read_table(reader, cls.beam_group_header, BeamGroup, 

end)) 

 

parameters = list(cls.read_table(reader, cls.beam_parameters_header, 

BeamParameters)) 

 

return cls(group=group, parameters=parameters) 

 

def write(self, writer): 

self.write_datatype(writer) 

self.write_table(writer, self.beam_group_header, self.group) 

writer.writeline(b'') 

self.write_table(writer, self.beam_parameters_header, self.parameters) 

 

 

class CAL2Section(Section): 

''' 

Representation of a CAL2 + stages group in a response section. 

''' 

 

cal2 = CAL2.T() 

stages = List.T(Stage.T()) 

 

@classmethod 

def read(cls, reader): 

cal2 = CAL2.read(reader) 

stages = [] 

handlers = { 

b'PAZ2': PAZ2, 

b'FAP2': FAP2, 

b'GEN2': GEN2, 

b'DIG2': DIG2, 

b'FIR2': FIR2} 

 

while True: 

line = reader.readline() 

reader.pushback() 

if end_section(line, b'CAL2'): 

break 

 

k = line[:4].upper() 

if k in handlers: 

stages.append(handlers[k].read(reader)) 

else: 

raise DeserializeError('unexpected line') 

 

return cls(cal2=cal2, stages=stages) 

 

def write(self, writer): 

self.cal2.write(writer) 

for stage in self.stages: 

stage.write(writer) 

 

 

class ResponseSection(Section): 

''' 

Representation of a DATA_TYPE RESPONSE line. 

 

Any subsequent CAL2+stages groups are handled as indepenent sections, so 

this type just serves as a dummy to read/write the DATA_TYPE RESPONSE 

header. 

''' 

 

keyword = b'RESPONSE' 

 

datatype = DataType.T() 

 

@classmethod 

def read(cls, reader): 

datatype = DataType.read(reader) 

return cls(datatype=datatype) 

 

def write(self, writer): 

self.datatype.write(writer) 

 

 

class OutageSection(Section): 

''' 

Representation of a DATA_TYPE OUTAGE section. 

''' 

 

keyword = b'OUTAGE' 

outages_header = b'NET Sta Chan Aux Start Date Time'\ 

b' End Date Time Duration Comment' 

report_period = OutageReportPeriod.T() 

outages = List.T(Outage.T()) 

 

@classmethod 

def read(cls, reader): 

DataType.read(reader) 

report_period = OutageReportPeriod.read(reader) 

outages = [] 

outages = list(cls.read_table(reader, cls.outages_header, 

Outage)) 

 

return cls( 

report_period=report_period, 

outages=outages) 

 

def write(self, writer): 

self.write_datatype(writer) 

self.report_period.write(writer) 

self.write_table(writer, self.outages_header, self.outages) 

 

 

class BulletinTitle(Block): 

 

_format = [ 

E(1, 136, 'a136')] 

 

title = String.T() 

 

 

g_event_types = dict( 

uk='unknown', 

ke='known earthquake', 

se='suspected earthquake', 

kr='known rockburst', 

sr='suspected rockburst', 

ki='known induced event', 

si='suspected induced event', 

km='known mine explosion', 

sm='suspected mine explosion', 

kx='known experimental explosion', 

sx='suspected experimental explosion', 

kn='known nuclear explosion', 

sn='suspected nuclear explosion', 

ls='landslide', 

de='??', 

fe='??',) 

 

 

class Origin(Block): 

_format = [ 

E(1, 22, x_date_time_2frac), 

E(23, 23, 'a1?'), 

E(25, 29, 'f5.2'), 

E(31, 35, 'f5.2'), 

E(37, 44, 'f8.4'), 

E(46, 54, 'f9.4'), 

E(55, 55, 'a1?'), 

E(57, 60, x_scaled('f4.1', km)), 

E(62, 66, x_scaled('f5.1', km)), 

E(68, 70, x_int_angle), 

E(72, 76, x_scaled('f5.1', km)), 

E(77, 77, 'a1?'), 

E(79, 82, x_scaled('f4.1', km)), 

E(84, 87, 'i4'), 

E(89, 92, 'i4'), 

E(94, 96, x_int_angle), 

E(98, 103, 'f6.2'), 

E(105, 110, 'f6.2'), 

E(112, 112, 'a1?'), 

E(114, 114, 'a1?'), 

E(116, 117, 'a2?'), 

E(119, 127, 'a9'), 

E(129, 136, 'a8')] 

 

time = Timestamp.T( 

help='epicenter date and time') 

 

time_fixed = StringChoice.T( 

choices=['f'], 

optional=True, 

help='fixed flag, ``"f"`` if fixed origin time solution, ' 

'``None`` if not') 

 

time_error = Float.T( 

optional=True, 

help='origin time error [seconds], ``None`` if fixed origin time') 

 

residual = Float.T( 

optional=True, 

help='root mean square of time residuals [seconds]') 

 

lat = Float.T( 

help='latitude') 

 

lon = Float.T( 

help='longitude') 

 

lat_lon_fixed = StringChoice.T( 

choices=['f'], optional=True, 

help='fixed flag, ``"f"`` if fixed epicenter solution, ' 

'``None`` if not') 

 

ellipse_semi_major_axis = Float.T( 

optional=True, 

help='semi-major axis of 90% c. i. ellipse or its estimate [m], ' 

'``None`` if fixed') 

 

ellipse_semi_minor_axis = Float.T( 

optional=True, 

help='semi-minor axis of 90% c. i. ellipse or its estimate [m], ' 

'``None`` if fixed') 

 

ellipse_strike = Float.T( 

optional=True, 

help='strike of 90% c. i. ellipse [0-360], ``None`` if fixed') 

 

depth = Float.T( 

help='depth [m]') 

 

depth_fixed = StringChoice.T( 

choices=['f', 'd'], optional=True, 

help='fixed flag, ``"f"`` fixed depth station, "d" depth phases, ' 

'``None`` if not fixed depth') 

 

depth_error = Float.T( 

optional=True, 

help='depth error [m], 90% c. i., ``None`` if fixed depth') 

 

nphases = Int.T( 

optional=True, 

help='number of defining phases') 

 

nstations = Int.T( 

optional=True, 

help='number of defining stations') 

 

azimuthal_gap = Float.T( 

optional=True, 

help='gap in azimuth coverage [deg]') 

 

distance_min = Float.T( 

optional=True, 

help='distance to closest station [deg]') 

 

distance_max = Float.T( 

optional=True, 

help='distance to furthest station [deg]') 

 

analysis_type = StringChoice.T( 

optional=True, 

choices=['a', 'm', 'g'], 

help='analysis type, ``"a"`` automatic, ``"m"`` manual, ``"g"`` guess') 

 

location_method = StringChoice.T( 

optional=True, 

choices=['i', 'p', 'g', 'o'], 

help='location method, ``"i"`` inversion, ``"p"`` pattern, ' 

'``"g"`` ground truth, ``"o"`` other') 

 

event_type = StringChoice.T( 

optional=True, 

choices=sorted(g_event_types.keys()), 

help='event type, ' + ', '.join( 

'``"%s"`` %s' % (k, g_event_types[k]) 

for k in sorted(g_event_types.keys()))) 

 

author = String.T(help='author of the origin') 

origin_id = String.T(help='origin identification') 

 

 

class OriginSection(TableSection): 

has_data_type_header = False 

 

table_setup = dict( 

header={ 

None: ( 

b' Date Time Err RMS Latitude Longitude ' 

b'Smaj Smin Az Depth Err Ndef Nsta Gap mdist Mdist ' 

b'Qual Author OrigID')}, 

attribute='origins', 

end=lambda line: end_section(line, b'EVENT'), 

cls=Origin) 

 

origins = List.T(Origin.T()) 

 

 

class EventTitle(Block): 

_format = [ 

E(1, 5, x_fixed(b'Event'), dummy=True), 

E(7, 14, 'a8'), 

E(16, 80, 'a65')] 

 

event_id = String.T() 

region = String.T() 

 

 

class EventSection(Section): 

''' 

Groups Event, Arrival, ... 

''' 

 

event_title = EventTitle.T() 

origin_section = OriginSection.T() 

 

@classmethod 

def read(cls, reader): 

event_title = EventTitle.read(reader) 

origin_section = OriginSection.read(reader) 

return cls( 

event_title=event_title, 

origin_section=origin_section) 

 

def write(self, writer): 

self.event_title.write(writer) 

self.origin_section.write(writer) 

 

 

class EventsSection(Section): 

''' 

Representation of a DATA_TYPE EVENT section. 

''' 

 

keyword = b'EVENT' 

 

bulletin_title = BulletinTitle.T() 

event_sections = List.T(EventSection.T()) 

 

@classmethod 

def read(cls, reader): 

DataType.read(reader) 

bulletin_title = BulletinTitle.read(reader) 

event_sections = [] 

while True: 

line = reader.readline() 

reader.pushback() 

if end_section(line): 

break 

 

if line.upper().startswith(b'EVENT'): 

event_sections.append(EventSection.read(reader)) 

 

return cls( 

bulletin_title=bulletin_title, 

event_sections=event_sections, 

) 

 

def write(self, writer): 

self.write_datatype(writer) 

self.bulletin_title.write(writer) 

for event_section in self.event_sections: 

event_section.write(writer) 

 

 

class BulletinSection(EventsSection): 

''' 

Representation of a DATA_TYPE BULLETIN section. 

''' 

 

keyword = b'BULLETIN' 

 

 

for sec in ( 

LogSection, ErrorLogSection, FTPLogSection, WaveformSection, 

NetworkSection, StationSection, ChannelSection, BeamSection, 

ResponseSection, OutageSection, EventsSection, BulletinSection): 

 

Section.handlers[sec.keyword] = sec 

 

del sec 

 

 

class MessageHeader(Section): 

''' 

Representation of a BEGIN/MSG_TYPE/MSG_ID/REF_ID group. 

''' 

 

version = String.T() 

type = String.T() 

msg_id = MsgID.T(optional=True) 

ref_id = RefID.T(optional=True) 

 

@classmethod 

def read(cls, reader): 

handlers = { 

b'BEGIN': Begin, 

b'MSG_TYPE': MsgType, 

b'MSG_ID': MsgID, 

b'REF_ID': RefID} 

 

blocks = {} 

while True: 

line = reader.readline() 

reader.pushback() 

ok = False 

for k in handlers: 

if line.upper().startswith(k): 

blocks[k] = handlers[k].read(reader) 

ok = True 

 

if not ok: 

break 

 

return MessageHeader( 

type=blocks[b'MSG_TYPE'].type, 

version=blocks[b'BEGIN'].version, 

msg_id=blocks.get(b'MSG_ID', None), 

ref_id=blocks.get(b'REF_ID', None)) 

 

def write(self, writer): 

Begin(version=self.version).write(writer) 

MsgType(type=self.type).write(writer) 

if self.msg_id is not None: 

self.msg_id.write(writer) 

if self.ref_id is not None: 

self.ref_id.write(writer) 

 

 

def parse_ff_date_time(s): 

toks = s.split() 

if len(toks) == 2: 

sdate, stime = toks 

else: 

sdate, stime = toks[0], '' 

 

stime += '00:00:00.000'[len(stime):] 

return util.str_to_time( 

sdate + ' ' + stime, format='%Y/%m/%d %H:%M:%S.3FRAC') 

 

 

def string_ff_date_time(t): 

return util.time_to_str(t, format='%Y/%m/%d %H:%M:%S.3FRAC') 

 

 

class TimeStamp(FreeFormatLine): 

''' 

Representation of a TIME_STAMP line. 

''' 

 

_format = [b'TIME_STAMP', 1] 

 

value = Timestamp.T() 

 

@classmethod 

def deserialize(cls, line, version_dialect): 

(s,) = cls.deserialize_values(line, version_dialect) 

return cls(value=parse_ff_date_time(s)) 

 

def serialize(self, line, version_dialect): 

return ( 

'TIME_STAMP %s' % string_ff_date_time(self.value)).encode('ascii') 

 

 

class Stop(FreeFormatLine): 

''' 

Representation of a STOP line. 

''' 

 

_format = [b'STOP'] 

 

dummy = String.T(optional=True) 

 

 

class XW01(FreeFormatLine): 

''' 

Representation of a XW01 line (which is a relict from GSE1). 

''' 

 

_format = [b'XW01'] 

 

dummy = String.T(optional=True) 

 

 

re_comment = re.compile(br'^(%(.+)\s*| \((#?)(.+)\)\s*)$') 

re_comment_usa_dmc = re.compile(br'^(%(.+)\s*| ?\((#?)(.+)\)\s*)$') 

 

 

class Reader(object): 

def __init__(self, f, load_data=True, version=None, dialect=None): 

self._f = f 

self._load_data = load_data 

self._current_fpos = None 

self._current_lpos = None # "physical" line number 

self._current_line = None 

self._readline_count = 0 

self._pushed_back = False 

self._handlers = { 

b'DATA_TYPE ': Section, 

b'WID2 ': WID2Section, 

b'OUT2 ': OUT2Section, 

b'DLY2 ': DLY2Section, 

b'CAL2 ': CAL2Section, 

b'BEGIN': MessageHeader, 

b'STOP': Stop, 

b'XW01': XW01, # for compatibility with BGR dialect 

b'HANG:': None, # for compatibility with CNDC 

b'VANG:': None, 

} 

self._comment_lines = [] 

self._time_stamps = [] 

self.version_dialect = [version, dialect] # main version, dialect 

self._in_garbage = True 

 

def tell(self): 

return self._current_fpos 

 

def current_line_number(self): 

return self._current_lpos - int(self._pushed_back) 

 

def readline(self): 

if self._pushed_back: 

self._pushed_back = False 

return self._current_line 

 

while True: 

self._current_fpos = self._f.tell() 

self._current_lpos = self._readline_count + 1 

ln = self._f.readline() 

self._readline_count += 1 

if not ln: 

self._current_line = None 

return None 

 

lines = [ln.rstrip(b'\n\r')] 

while lines[-1].endswith(b'\\'): 

lines[-1] = lines[-1][:-1] 

ln = self._f.readline() 

self._readline_count += 1 

lines.append(ln.rstrip(b'\n\r')) 

 

self._current_line = b''.join(lines) 

 

if self.version_dialect[1] == 'USA_DMC': 

m_comment = re_comment_usa_dmc.match(self._current_line) 

else: 

m_comment = re_comment.match(self._current_line) 

 

if not self._current_line.strip(): 

pass 

 

elif m_comment: 

comment_type = None 

if m_comment.group(3) == b'#': 

comment_type = 'ISF' 

elif m_comment.group(4) is not None: 

comment_type = 'IMS' 

 

comment = m_comment.group(2) or m_comment.group(4) 

 

self._comment_lines.append( 

(self._current_lpos, comment_type, 

str(comment.decode('ascii')))) 

 

elif self._current_line[:10].upper() == b'TIME_STAMP': 

self._time_stamps.append( 

TimeStamp.deserialize( 

self._current_line, self.version_dialect)) 

 

else: 

return self._current_line 

 

def get_comments_after(self, lpos): 

comments = [] 

i = len(self._comment_lines) - 1 

while i >= 0: 

if self._comment_lines[i][0] <= lpos: 

break 

 

comments.append(self._comment_lines[i][-1]) 

i -= 1 

 

return comments 

 

def pushback(self): 

assert not self._pushed_back 

self._pushed_back = True 

 

def __iter__(self): 

return self 

 

def next(self): 

return self.__next__() 

 

def __next__(self): 

try: 

while True: 

line = self.readline() 

if line is None: 

raise StopIteration() 

 

ignore = False 

for k in self._handlers: 

if line.upper().startswith(k): 

if self._handlers[k] is None: 

ignore = True 

break 

 

self.pushback() 

sec = self._handlers[k].read(self) 

if isinstance(sec, Stop): 

self._in_garbage = True 

else: 

self._in_garbage = False 

return sec 

 

if not self._in_garbage and not ignore: 

raise DeserializeError('unexpected line') 

 

except DeserializeError as e: 

e.set_context( 

self._current_lpos, 

self._current_line, 

self.version_dialect) 

raise 

 

 

class Writer(object): 

 

def __init__(self, f, version='GSE2.1', dialect=None): 

self._f = f 

self.version_dialect = [version, dialect] 

 

def write(self, section): 

section.write(self) 

 

def writeline(self, line): 

self._f.write(line.rstrip()) 

self._f.write(b'\n') 

 

 

def write_string(sections): 

from io import BytesIO 

f = BytesIO() 

w = Writer(f) 

for section in sections: 

w.write(section) 

 

return f.getvalue() 

 

 

def iload_fh(f, **kwargs): 

''' 

Load IMS/GSE2 records from open file handle. 

''' 

try: 

r = Reader(f, **kwargs) 

for section in r: 

yield section 

 

except DeserializeError as e: 

raise FileLoadError(e) 

 

 

def iload_string(s, **kwargs): 

''' 

Read IMS/GSE2 sections from bytes string. 

''' 

 

from io import BytesIO 

f = BytesIO(s) 

return iload_fh(f, **kwargs) 

 

 

iload_filename, iload_dirname, iload_glob, iload = util.make_iload_family( 

iload_fh, 'IMS/GSE2', ':py:class:`Section`') 

 

 

def dump_fh(sections, f): 

''' 

Dump IMS/GSE2 sections to open file handle. 

''' 

try: 

w = Writer(f) 

for section in sections: 

w.write(section) 

 

except SerializeError as e: 

raise FileSaveError(e) 

 

 

def dump_string(sections): 

''' 

Write IMS/GSE2 sections to string. 

''' 

 

from io import BytesIO 

f = BytesIO() 

dump_fh(sections, f) 

return f.getvalue() 

 

 

if __name__ == '__main__': 

from optparse import OptionParser 

 

usage = 'python -m pyrocko.ims <filenames>' 

 

util.setup_logging('pyrocko.ims.__main__', 'warning') 

 

description = ''' 

Read and print IMS/GSE2 records. 

''' 

 

parser = OptionParser( 

usage=usage, 

description=description, 

formatter=util.BetterHelpFormatter()) 

 

parser.add_option( 

'--version', 

dest='version', 

choices=g_versions, 

help='inial guess for version') 

 

parser.add_option( 

'--dialect', 

dest='dialect', 

choices=g_dialects, 

help='inial guess for dialect') 

 

parser.add_option( 

'--load-data', 

dest='load_data', 

action='store_true', 

help='unpack data samples') 

 

parser.add_option( 

'--out-version', 

dest='out_version', 

choices=g_versions, 

help='output format version') 

 

parser.add_option( 

'--out-dialect', 

dest='out_dialect', 

choices=g_dialects, 

help='output format dialect') 

 

(options, args) = parser.parse_args(sys.argv[1:]) 

 

for fn in args: 

with open(fn, 'rb') as f: 

 

r = Reader(f, load_data=options.load_data, 

version=options.version, dialect=options.dialect) 

 

w = None 

if options.out_version is not None: 

w = Writer( 

sys.stdout, version=options.out_version, 

dialect=options.out_dialect) 

 

for sec in r: 

if not w: 

print(sec) 

 

else: 

w.write(sec) 

 

if isinstance(sec, WID2Section) and options.load_data: 

tr = sec.pyrocko_trace(checksum_error='warn')