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strbs: Star Tracker BoreSight calculation

• SYNOPSIS
  
      strbs instrument=<instr> ra=<ra> dec=<dec> apos=<apos> odffixout=true|false
            bstoolsout=true|false
  
• DESCRIPTION
  Given the prime instrument instr and its viewing direction in terms of Right Ascension and Declination of the boresight + astronomical position angle strbs computes the viewing direction of the star tracker and associated position angle - result is written to stdout in verbose form (default) or as an odffix command line if odffixout=true or as an insbs command line if bstoolsout=true.

  The Right Ascension/Declination of the instrument boresight can be entered in either of the forms

        23h59m48.12s / 45o38'14.55"
  

  or decimal degrees:

        123.23445 / 45.238474
  

  Position angles have to be entered in decimal degrees.

• REFERENCE
  See task epicbscalgen and cal documentation for definition of boresight related coordinate frames.