hijitter

     This application computes angular corrections from pixel offsets in the
     input jitter file and applies the corrections to the undistorted output 
     cube.  This application is procedural in that it runs other applications.
     It runs through a series of applications twice.  The first time it applies 
     the jitter corrections and calculates additional pitch rate and yaw angles 
     to center the remaining camera pointing errors around zero.  The output 
     cube files are deleted and the series of applications is run again, 
     including the additional pitch rate and yaw corrections.

     The first step it performs is to run spiceinit on all the FROMLIST cubes 
     with the parameter attach=no.  A version of the MASTER file is saved and 
     run through the application spicefit to remove noise in the camera 
     pointing.  This file will be used in the noproj runs as the match cube.  
     The next application run is appjit and it needs to load the Spice from the 
     files directly in order have access to Spice information not typically 
     stored on the Isis cube labels. This application applies the corrections 
     from the JITTER file to the camera pointing in the FROMLIST cubes.  Now the 
     FROMLIST cubes are run through noproj, removing the jitter from the pixel 
     positions and the camera distortion.  The results are measured on adjacent
     ccd's by the application hijitreg and used to compute the additional pitch 
     rate and yaw required to center the errors around zero.  

     Now the procedure is repeated with the calculated pitch and yaw passed into 
     appjit as input parameters.  The jitter-reduced and distortion-free output 
     cubes are created by the final set of noproj runs on adjacent ccd's. 

     If crop=true then the application crops the extended portion of the   
     image. The starting line and number of lines parameter for crop 
     application is calculated from the ephemeris time in the  jitter  
     correction file. LineRate is used to get the starting and ending line 
     information.