[daip] technical detail

[Eric Greisen]

Elias Brinks writes:


 > Further to yesterday's e-mail, I spotted a minor bug in AVSPC.
 > When the new map is produced, the reference pixel is correctly
 > adjusted in the header BUT the alternate reference pixel is
 > NOT corrected. This causes problems, of course, when then
 > later on you do an ALTSWITCH.
 > 
 > I checked this in SPLIT, but fortunately here both refpix and altrefpix
 > are treated the same (correct) way. Note that I only checked this
 > for a simple boxcar averaging over 2 pixels...nothing fancy   ;)
 > 
 > You might want to correct this, to prevent the unweary user from
 > getting the wrong velocities on their maps.
 > 

I have added code for the alternate ref pixel in both TST and NEW.

Eric Greisen