ATM

Consists of three files patterned as azYYMMDD[ABC].cal, where the last character before the .cal is A for scan speed 12.5, B = 25, C = 50.

The contents of the files are like:

AZ16 bandpairs 10 1 1000 az060306A.cal
87.72727273 24498 6.12019233 24468 2.31661442 24425 5.34458259 24501 2.05878963 24516 2.24453694 24704 1.29384497 24663 3.35342640 24280 0.64997509 24088 0.15410141 24283

Format appears to be 10 pairs of numbers specifying min and max sensor value for that band.

ATM calibration procedure

(as described by Andrew Wilson and dodgily transcribed by Mike)

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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

Bad pixel table (text format, unsure of contents)

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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.