Feb 18, 2010
Greg Holsclaw
Below are descriptions of the updates made to the UVIS calibration routines.
get_euv_2010_lab_calibration.pro
 Now applies the flat-field corrector by default
 Now requires spacecraft time as an input parameter
 Optional keyword ‘noff’ to prevent applying flat-field corrector
 Calls ‘read_spica_ff_data.pro’ to retrieve the flat-field corrector
 Calls ‘get_uvis_modifier.pro’ to retrieve the flat-field modifier
 Requires a path (wdir, near top of code) pointing to the location of the calibration file
‘EUV_1999_Lab_Cal.dat’
get_fuv_2010_lab_calibration.pro
 Calls ‘get_uvis_modifier.pro’ to retrieve the flat-field modifier
 Requires a path (wdir, near top of code) pointing to the location of the calibration file
‘FUV_1999_Lab_Cal.dat’
 Added an optional keyword ‘keep_evil’. This can be used in situations where the detector
is heavily binned, producing values which are mostly NaNs. Setting this flag to one will
prohibit the application of the flat-field as well as the forced exclusion of evil pixels.
A new helper routine:
get_uvis_modifier.pro
 Purpose: this interpolates the flat-field modifier to the time of the observation being
calibrated
 Requires a path (wdir_mods, near top of code) pointing to the location of the flat-field
modifier data files
Flat-field modifiers are located on the UVIS team website at:
http://lasp.colorado.edu/cassini/team-site/tools_software/cal_flatfield_tools.htm
New modifiers will be added periodically.