New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Support extracting UTC ISOTime from 'GPS' and 'TT' timescales. #5

timstaley opened this Issue Nov 9, 2016 · 0 comments


None yet
1 participant

timstaley commented Nov 9, 2016

The VOEvent spec specifies that timestamps (TimeInstant) for event details in the WhereWhen section can use the follow timescale standards:

UTC (Coordinated Universal Time [26]), TT (Terrestrial Time, currently 65.184
seconds ahead of UTC), GPS time, or TDB (Barycentric Dynamical Time).

The pull_isotime convenience routine currently supports extracting/converting UTC timestamps from UTC and TDB format.

If I understand correctly, TT and GPS timestamps should be specified using the TimeOffset sub-element of the TimeInstant, because that's how those standards work - but this isn't actually made explicit in the VOEvent standard, and there's no example other than UTC time. As a result I'm putting off implementing this until there's actually a use-case / example packet for it. If you have one, get in touch and I'll be happy to help with it.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment