TimeUnix

class astropy.time.TimeUnix(val1, val2, scale, precision, in_subfmt, out_subfmt, from_jd=False)

Bases: TimeFromEpoch

Unix time (UTC): seconds from 1970-01-01 00:00:00 UTC, ignoring leap seconds.

For example, 946684800.0 in Unix time is midnight on January 1, 2000.

NOTE: this quantity is not exactly unix time and differs from the strict POSIX definition by up to 1 second on days with a leap second. POSIX unix time actually jumps backward by 1 second at midnight on leap second days while this class value is monotonically increasing at 86400 seconds per UTC day.

Attributes Summary

cache	Return the cache associated with this instance.
epoch	Reference epoch time from which the time interval is measured
epoch_format
epoch_scale
epoch_val
epoch_val2
in_subfmt
jd1
jd2
jd2_filled
mask
masked
name
out_subfmt
precision
scale	Time scale
subfmts
unit
value	Return time representation from internal jd1 and jd2.

Methods Summary

mask_if_needed(value)
set_jds(val1, val2)	Initialize the internal jd1 and jd2 attributes given val1 and val2.
to_value([parent])	Return time representation from internal jd1 and jd2.

Attributes Documentation

cache

Return the cache associated with this instance.

epoch

Reference epoch time from which the time interval is measured

epoch_format = 'iso'

epoch_scale = 'utc'

epoch_val = '1970-01-01 00:00:00'

epoch_val2 = None

in_subfmt

jd1

jd2

jd2_filled

mask

masked

name = 'unix'

out_subfmt

precision

scale

Time scale

subfmts = (('float', <class 'numpy.float64'>, None, <ufunc 'add'>), ('long', <class 'numpy.float128'>, <function longdouble_to_twoval>, <function twoval_to_longdouble>), ('decimal', <class 'numpy.object_'>, <numpy.vectorize object>, <numpy.vectorize object>), ('str', <class 'numpy.str_'>, <numpy.vectorize object>, <numpy.vectorize object>), ('bytes', <class 'numpy.bytes_'>, <numpy.vectorize object>, <numpy.vectorize object>))

unit = 1.1574074074074073e-05

value

Methods Documentation

mask_if_needed(value)

set_jds(val1, val2)

Initialize the internal jd1 and jd2 attributes given val1 and val2. For an TimeFromEpoch subclass like TimeUnix these will be floats giving the effective seconds since an epoch time (e.g. 1970-01-01 00:00:00).

to_value(parent=None, **kwargs)

Return time representation from internal jd1 and jd2. Subclasses that require parent or to adjust the jds should override this method.