propagator test resultsgreenspun.com : LUSENET : CU Statistical Orbit Determination : One Thread
I've run a test case on the propagator (i.e. no obs data, no gps data, no filter, ..., only the integrator and dynamic model routines). If you would like to see the results, they are saved in the file:
There is also a routine which will load this data set and plot ECI XYZ position & velocity, and the corresponding residuals compared to the truth data set:
You should be able to access these files in my directory and copy them to wherever you want to run it. Let me know if you have trouble with it.
A few things to note about these results: - I ran the test for 12000 seconds, which corresponds to about 2 periods of the satellite orbit (one period for MicroLab-1 is supposed to be about 100 minutes). Also, these results were obtained just using Jason Stauch's J2 grav model NOT the 70x70. Also, the test took about 6 minutes to run (but remember no filter, no obs, no gps, no 70x70 grav, ...).
- The residuals are plotted vs JD, long story on this one, but in short it is because the truth data epochs do not correspond to every integrated time step. Will get that converted into seconds/hours as soon as I figure it out.
The results are encouraging. The plots look good-- looks like an orbit to me with a period of about 100 minutes (1 hour, 40 minutes).
-- Patrick Shriver (Patrick.Shriver@colorado.edu), April 27, 2000