pole
Description
The program POLE solves for the pole right ascension, declination, and rotation rate for a body in principal axis rotation. The rotation rate is calculated in degrees/day while right ascension and declination are in degrees.
For pole to run, POLE.TXT and LMRKLIST.TXT are required in the working directory. LMRKLIST.TXT is just a file containing a list of landmarks and POLE.TXT is a single row file that contains the predicted pole RA (deg), DEC (deg), PM (deg), and OMEGA (deg/day). These values are given in the .tpc kernel file for the object.
POLE.TXT Example
86 -65 89.00000000 2010.48945
Input-Files
- POLE.TXT - simple text file containing nominal pole RA (deg), DEC (deg), PM (deg), OMEGA (deg/day)
LMRKLIST.TXT - list of landmarks
Input stdin
- A time in UTC (make sure it is within the span supported by the kernels)
2018 NOV 16 13:09:54.824
- Determine whether you want the rotation rate fixed ( y for yes, n for no)
- 0 if you want to iterate, 1 if you want to keep result (updates POLE.TXT), 2 if you want previous result (nominal if on 1st iteration)
Output
86.60062 -65.00002 90.42707 2009.99979311 0.05176 0.02171 0.00000001- First row is all the new pole parameters for POLE.TXT while the second row is the change.