[Spice_discussion] Delta_t from Earth PCK?
ernest.t.wright at nasa.gov
Fri Jun 19 07:28:26 PDT 2015
On 06/18/2015 10:30 PM, Nat Bachman wrote:
> It's good we're having this discussion. :)
I agree. :)
OK, so off the top of my head, the delta_t in earth_#_predict.bpc is
going to be about 3 seconds too small, moving the eclipse center line
about a kilometer west at 45N. That's too small to see in what I'm
working on at the moment, so I'm going to stop worrying about it. It's
still a lot better than IAU_EARTH.
> The best NAIF can do is update the long term predict file to use
> available data up to the current date.
If that were to happen, I'd definitely use it.
Thanks for your help!
Ernest T. Wright ernest.t.wright at nasa.gov
Scientific Visualization Studio http://svs.gsfc.nasa.gov
NASA/Goddard Space Flight Center, Code 606.4 voice: +1 301 286-1569
Greenbelt, MD 20771 fax: +1 301 286-1634
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