TimeFromEpoch

class astropy.time.TimeFromEpoch(val1, val2, scale, precision, in_subfmt, out_subfmt, from_jd=False)[source]

Bases: astropy.time.TimeNumeric

Base class for times that represent the interval from a particular epoch as a floating point multiple of a unit time interval (e.g. seconds or days).

Attributes Summary

cache

Return the cache associated with this instance.

epoch

Reference epoch time from which the time interval is measured

in_subfmt

jd1

jd2

jd2_filled

mask

masked

out_subfmt

scale

Time scale

subfmts

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

in_subfmt
jd1
jd2
jd2_filled
mask
masked
out_subfmt
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>))
value

Methods Documentation

mask_if_needed(value)
set_jds(val1, val2)[source]

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)[source]

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