= pole =

== 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

'''''' /!\ 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. 

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== 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
}}}

 1.#2 Create a POLE.TXT file.

Sample POLE.TXT file:
{{{
       86         -65      89.00000000    2010.48945
}}}

 1.#3 Answer whether you want the rotation rate fixed (y for yes, n for no).

 1.#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                 0.00000001
}}}

The first row gives all the new pole parameters for POLE.TXT. The second row shows the change.

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''(Compiled by KD)''

CategoryPrograms