XMM-Newton Science Analysis System


orbit (orbit-2.9) [xmmsas_20050815_1803-6.5.0]

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Algorithm

   subroutine orbit
    read_parameters    # get parameters from param file
    OAL_odfInfo        # get StartTime, EndTime of file

    open_outfile       # open FITS output file
    addTable           # create new table
    foreach column     # create 7 new columns: time, x, y, z, Vx, Vy, Vz
     addColumn
    next

    for start_time to stop_time, step sampling_interval

     OAL_getPosition   # return position and velocity vectors from ODF

     foreach column    # time, x, y, z, Vx, Vy, Vz
      fill_column_temp_pointer
      if (column_temp_pointer(i) not defined)
       column_temp_pointer(i) = HUGE
      end if
     next

    next  

    OAL_proposalInfo   # get basic info to write as keywords
    write_attributes_to_outfile     # add proposal info as keywords
    release Table      # close FITS extension
    release Set        # close FITS file
    OAL_releaseMemory  # close ODF files
    close_outfile
   end subroutine orbit