Next: 13.13 Inhomogeneous FCS illumination Up: 13 Calibration G Products Previous: 13.11 PHT-P and PHT-C
Next: 13.13 Inhomogeneous FCS illumination
Up: 13 Calibration G Products
Previous: 13.11 PHT-P and PHT-C
Description Parameter: section 4.5.4
Processing Level: SPD
Usage in processing: section 7.4.3
File Type: Fits Image
Units: dimensionless
Number of Records: 1
File Names: PC1ILLUM_01, PC1ILLUM_02,
PC2ILLUM_01, PC2ILLUM_02,
The FCS illumination is not uniform. For the PHT-C arrays, the non-uniform
illumination requires a pixel dependent correction to the FCS power
calibration table which gives only the mean value over the pixel
array. Note that the illumination correction products contain only 1 record.
The properties (FCS1,TRS2) altered between rev 93 and 94 due to unknown reasons. This event changed the FCS illumination pattern. Therefore two calibration files are available: one for before rev 94 (suffix _01) and one for rev 94 and higher (suffix _02).
All products have:
NAXIS = 4
TYPE = R*4
AXIS Length Description 1 9 C100 Pixels, in same order as SPD 2 7(see section A.1) 3 2 each FCS 4 2 Correction and uncertainty
AXIS Length Description 1 4 C200 Pixels, in same order as SPD 2 5(see section A.1) 3 2 each FCS 4 2 Correction and uncertainty
ISOPHOT Data Users Manual, Version 4.1, SAI/95-220/Dc