= Specim =

Calibration files are produced by Specim when they do maintenance on the instrument.

== Eagle ==
Files look like:
 SN100022_130207_XB.cfg::
   Lens configuration file - contains calibration date and a few other human-readable items
 SN100022_130207_XB.hdr::
   Header file for the data file..
 SN100022_130207_XB.cal::
   Data file (containing several frames?) of the per-pixel calibrations

== Hawk ==
 SN300011_150207_NUC1.cfg::
   Lens configuration file - contains calibration date and a few other human-readable items
 SN300011_150207_NUC1.hdr::
   Header file for the data file..
 SN300011_150207_NUC1.cal::
   Data file (containing several frames?) of the per-pixel calibrations
 SN300011_150207_NUC1.bad::
   

= CASI =

Radiometric calibration done by <name of guy> at Environment Agency (or Met Office?).  Consists of five 700KB files named inXXaA.rad, where X = two digit calibration sequence (up to 36 for 2007) and A = aperature (1-5).

Additionally, there is a file that describes the view angles for each pixel to compensate for (lens?) distortions in the view field.  The current version of this file is named NERC253_527tan.txt and looks like:
{{{
0 26.311677 0.051465
1 26.221749 0.089928
2 26.131682 0.090067
3 26.041477 0.090205
4 25.951133 0.090344
5 25.860650 0.090483
6 25.770029 0.090621
7 25.679270 0.090759
8 25.588372 0.090898
9 25.497337 0.091036
...
504 -26.131682 0.090205
505 -26.221749 0.090067
506 -26.311677 0.089928
507 -26.401465 0.089789
508 -26.491115 0.089649
509 -26.580625 0.089510
510 -26.669996 0.089371
511 -26.759227 0.089231
}}}

I'm guessing CCD column number, X angle, Y angle.