def parse_taustartts(subtables):
""" extract observation time from CASA table header
"""
observation_table = subtables["LOFAR_OBSERVATION"]
julianstart = observation_table.getcol("OBSERVATION_START")[0]
unixstart = julian2unix(julianstart)
taustart_ts = datetime.datetime.fromtimestamp(unixstart)
return taustart_ts
def parse_taustartts(self):
""" extract image start time from CASA table header
"""
# Note that we sort the table in order of ascending start time then choose
# the first value to ensure we get the earliest possible starting time.
observation_table = self.subtables['LOFAR_OBSERVATION']
julianstart = observation_table.query(sortlist="OBSERVATION_START",
limit=1).getcell(
"OBSERVATION_START", 0)
unixstart = julian2unix(julianstart)
taustart_ts = datetime.datetime.fromtimestamp(unixstart)
return taustart_ts
def parse_taustartts(subtables):
""" extract image start time from CASA table header
"""
# Note that we sort the table in order of ascending start time then choose
# the first value to ensure we get the earliest possible starting time.
observation_table = subtables['LOFAR_OBSERVATION']
julianstart = observation_table.query(
sortlist="OBSERVATION_START", limit=1).getcell(
"OBSERVATION_START", 0
)
unixstart = julian2unix(julianstart)
taustart_ts = datetime.datetime.fromtimestamp(unixstart)
return taustart_ts
def test_julian2unix(self):
self.assertEqual(coordinates.julian2unix(coordinates.unix_epoch), 0)