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||Category B||Version 3.0|| |
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| 1. Input a time in UTC. . /!\ Make sure the time is within the span supported by the kernels. |
=== 1. Input a time in UTC. === /!\ Make sure the time is within the span supported by the kernels. |
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| 1.#2 Create a POLE.TXT file. | === 2. Create a POLE.TXT file. === |
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| 1.#3 Answer whether you want the rotation rate fixed (y for yes, n for no). | === 3. Answer whether you want the rotation rate fixed (y for yes, n for no). === |
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| 1.#4 Enter | === 4. Enter === |
pole
Category B |
Version 3.0 |
Description
This program 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 calculated in degrees.
Input Files
- POLE.TXT - simple text file containing nominal pole RA (deg), DEC (deg), PM (deg), OMEGA (deg/day)
LMRKLIST.TXT - list of landmarks
![/!\](/wiki/classic/img/alert.png "/!\"){kind=small}
POLE.TXT and LMRKLIST.TXT must be in the working directory.
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. LMRKLIST.TXT contains a list of landmarks.
Using pole
1. Input a time in UTC.
- Make sure the time is within the span supported by the kernels.
2018 NOV 16 13:09:54.824
2. Create a POLE.TXT file.
Sample POLE.TXT file:
86 -65 89.00000000 2010.48945
3. Answer whether you want the rotation rate fixed (y for yes, n for no).
4. Enter
0 if you want to iterate
1 if you want to keep the result (this updates POLE.TXT)
2 if you want the previous result (this is nominal if on the first iteration)
Here is a sample output from the POLE.TXT input:
86.60062 -65.00002 90.42707 2009.99979311
0.05176 0.02171 0.00000001The first row gives all the new pole parameters for POLE.TXT. The second row shows the change.
(Compiled by KD)