earth-acis-FOV code documentation

1. Introduction:
   The earth-acis-FOV software determines the solid angle of earth shine that is incident on the ACIS cold radiator. This value is important to understanding the heating of the focal plane as the cold radiator is directly connected to the focal plane. While one normally thinks of the heat being transferred from the focal plane to the cold radiator out to space, the reverse can also happen. The radiator is sheilded by two shades that are covered with goldized Kapton. These shades are used in the calculations to include internal reflections between the shades.
2. Execution dependancies:
   Code is automatically executed from within "lr" but can be run independently if need be. In this case, execution would require that the load review products are readily available, specifically the MNVR summary file that is included in the backstop tar file for each load.
3. Script dependancies:
   

   Script is executed from lr

   Files required:

   • /data/acis/LoadReviews/data/Chandra.stk
   • /data/acis/LoadReviews/data/Sun.txt

   These files are LINKS to the actual data files. If they are out of date, please go to: the ACIS Ops Twiki, Ephemeris File Creation for instructions on how to update these files.

   Scripts that depend on the outputs

   A plotting script, plot_FOV.pl, depends on the output.

4. Detailed design Memo (still needs minor updates as of 3/07/13)
5. Code Location and execution
6. Problems and Issues
7. Notes