[AstroPy] Convert GPS time to UTC time

David Berry d.berry at jach.hawaii.edu
Mon Dec 9 12:22:43 EST 2013


On 9 December 2013 16:57, Aldcroft, Thomas
<aldcroft at head.cfa.harvard.edu> wrote:
> How about this with astropy 0.3:
>
>>>> from astropy.time import Time
>>>> t_gps = Time(3600.0, format='gps')  # seconds since 1980-01-06 00:00:00
>>>> UTC
>>>> t_gps.utc.iso
> '1980-01-06 01:00:00.000'
>
> This basically creates a Time object with the GPS format representation.  By
> default this object is in TAI scale, so you first convert to UTC and then
> ask for the ISO format representation.  As I understand GPS is not a time
> scale, but a simple difference of time in the TAI scale from the given
> epoch.

Doesn't that make it a timescale? After all TT (Terrestrial Time) is
also just a constant offset from TAI.

David



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