Next: 13.8 Vignetting Corrections Up: 13 Calibration G Products Previous: 13.6 Signal correction reset
Next: 13.8 Vignetting Corrections
Up: 13 Calibration G Products
Previous: 13.6 Signal correction reset
Description Parameter: section 4.2.5
Processing Level: SPD
Usage in processing: section 7.3.2
File Type: FITS Image
Units: V/s
File Names: PSDARK, PPDARK, PC1DARK, PC2DARK
To derive the absolute power falling on the detector it is necessary to
remove the detector dark signal. For chopped measurements where only the
signal difference matters, the dark signal correction is in principle not
required. In the Cal G file the unit for the detector dark currents is V/s.
The dark signal depends on the orbital phase of the satellite during the observation like the detector responsivity, but is not influenced by the curing in the handover window.
All products have:
NAXIS = 3
TYPE = R*4
AXIS Length Description 1 100 Orbital phase: each element corresponds to a phase in the range from 0.01 to 1.0 in steps of 0.01 2 128 Pixels - PHT-SS (1-64) and PHT-SL (65-128) 3 2 Dark signal and uncertainty
AXIS Length Description 1 100 Orbital phase: each element corresponds to a phase in the range from 0.01 to 1.0 in steps of 0.01 2 3 PHT-P detectors, P1,P2,P3 3 2 Dark signal and uncertainty
AXIS Length Description 1 100 Orbital phase: each element corresponds to a phase in the range from 0.01 to 1.0 in steps of 0.01 2 9 C100 pixels, in same order as SPD. 3 2 Dark signal and uncertainty
AXIS Length Description 1 100 Orbital phase: each element corresponds to a phase in the range from 0.01 to 1.0 in steps of 0.01 2 4 C200 pixels, in same order as SPD. 3 2 Dark signal and uncertainty
ISOPHOT Data Users Manual, Version 4.1, SAI/95-220/Dc