Commit Graph

4 Commits

Author SHA1 Message Date
Don Cross
eec6e0b782 Removed obsolete Delta T code generator logic.
We don't need to generate Delta T tables any more because
none of the Astronomy Engine supported languages use it any more.
Now they all use Espenak/Meeus polynomials instead.
2020-05-15 19:40:35 -04:00
Don Cross
f2ee3d38b8 Moved JPL Horizons file for DeltaT so it doesn't break unit tests.
I downloaded the airless_Moon_dt.txt file from JPL Horizons so that
I could reverse engineer their DeltaT function. But keeping it in
the horizons directory caused unit test breakage. Moved to delta_t
directory so dtplot can still use it to make graphs.
2020-05-15 14:16:11 -04:00
Don Cross
258b0572a0 Plot a graph of Delta T extrapolator versus generated function. 2020-05-15 13:05:00 -04:00
Don Cross
36643fc47a Fixed #2 - use finer-grained delta-t values without discontinuities.
Using historic, recent, and predicted values of TT-UT instead of
UTC leap seconds.  With linear interpolation, there are no longer
discrete jumps in the calculated TT values. Hopefully, this will
make event solvers (rise, set, etc) more well-behaved.
2019-04-14 16:42:50 -04:00