Source code for pyrfu.pyrf.ttns2datetime64
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# 3rd party imports
import numpy as np
from cdflib import cdfepoch
# Local imports
from .timevec2iso8601 import timevec2iso8601
__author__ = "Louis Richard"
__email__ = "louisr@irfu.se"
__copyright__ = "Copyright 2020-2023"
__license__ = "MIT"
__version__ = "2.4.2"
__status__ = "Prototype"
[docs]def ttns2datetime64(time):
r"""Convert time in epoch_tt2000 (nanosedconds since J2000) to datetime64
in ns units.
Parameters
----------
time : ndarray
Time in epoch_tt2000 (nanoseconds since J2000) format.
Returns
-------
time_datetime64 : ndarray
Time in datetime64 format in ns units.
"""
message = "time must be float, int, or array_like"
assert isinstance(time, (float, int, list, np.ndarray)), message
#
time_tt2000 = cdfepoch.breakdown_tt2000(time)
# Convert to ISO 8601 string 'YYYY-MM-DDThh:mm:ss.mmmuuunnn'
time_iso8601 = timevec2iso8601(time_tt2000)
#
time_datetime64 = time_iso8601.astype("datetime64[ns]")
return time_datetime64