Next: 13.11 PHT-P and PHT-C Up: 13 Calibration G Products Previous: 13.9 Correction for signal
Next: 13.11 PHT-P and PHT-C
Up: 13 Calibration G Products
Previous: 13.9 Correction for signal
Description Parameter: section 3.5, 5.2.2
Processing Level: SPD
Usage in processing: section 7.4
File Type: FITS Image
Units: mW
File names: PP1FCSPOW, PP2FCSPOW,
PP3FCSPOW_01, PP3FCSPOW_02,
PC1FCSPOW_01, PC1FCSPOW_02,
PC2FCSPOW_01, PC2FCSPOW_02
The FCS power calibration tables give the electrical power in mW applied
to the FCS as a function of filter, TRS, FCS and the index in the
table listing the in-band power on the detector in regular logarithmic
intervals. For a given filter, TRS, and FCS combination the indices i-1,i
and PFCS(i-1), PFCS(i) are retrieved from the Cal G file.
PFCS(i) is the first FCS power in the table higher than the actual
FCS power PFCS, meas used in the FCS measurement.
Once the indices have been determined Table 13.4 is used
to convert these to in-band powers on the detector Pdet.
| index | Pdet | index | Pdet | index | Pdet |
| 1 | 1.78E-20 | 16 | 1.00E-16 | 31 | 5.62E-13 |
| 2 | 3.16E-20 | 17 | 1.78E-16 | 32 | 1.00E-12 |
| 3 | 5.62E-20 | 18 | 3.16E-16 | 33 | 1.78E-12 |
| 4 | 100.E-19 | 19 | 5.62E-16 | 34 | 3.16E-12 |
| 5 | 1.78E-19 | 20 | 1.00E-15 | 35 | 5.62E-12 |
| 6 | 3.16E-19 | 21 | 1.78E-15 | 36 | 1.00E-11 |
| 7 | 5.62E-19 | 22 | 3.16E-15 | 37 | 1.78E-11 |
| 8 | 1.00E-18 | 23 | 5.62E-15 | 38 | 3.16E-11 |
| 9 | 1.78E-18 | 24 | 1.00E-14 | 39 | 5.62E-11 |
| 10 | 3.16E-18 | 25 | 1.78E-14 | 40 | 1.00E-10 |
| 11 | 5.62E-18 | 26 | 3.16E-14 | 41 | 1.78E-10 |
| 12 | 1.00E-17 | 27 | 5.62E-14 | 42 | 3.16E-10 |
| 13 | 1.78E-17 | 28 | 1.00E-13 | 43 | 5.62E-10 |
| 14 | 3.16E-17 | 29 | 1.78E-13 | 44 | 1.00E-09 |
| 15 | 5.62E-17 | 30 | 3.16E-13 | 45 | 1.78E-09 |
The final in-band power obtained in OLP is derived from a linear interpolation in logarithmic space in between log(Pdet(i-1)) and log(Pdet(i)) based on PFCS(i-1), PFCS(i) and PFCS, meas.
The properties (FCS1,TRS2) altered between rev 93 and 94 due to unknown reasons. This event changed the FCS calibration for those detectors for which the (FCS1,TRS2) combination is used namely: P3, C100, and C200. For these detectors two calibration files are available: one for FCS measurements obtained before rev 94 (suffix _01) and one for rev 94 and higher (suffix _02).
During the ISO mission only specific FCS/TRS combinations were used. Entries in the Cal G files that do not refer to these settings have been set to zero:
Example: for detector P2, settings FCS1/TRS2 and FCS2/TRS2 are not allowed and therefore set to zero in the corresponding table.
For all FCS power calibration tables, the following FITS keywords are
common:
NAXIS = 4
TYPE = REAL*4
AXIS Length Description 1 45 Index for in-band optical power on detector 2 10 Filters ordered according to (see section A.1): 3.3, 3.6, 4.8, 7.3, 7.7, 10, 11.3, 12.8, 15, 11.5m 3 2 Each TRS: TRS1, TRS2 4 2 Each FCS: FCS1, FCS2
AXIS Length Description 1 45 Index for in-band optical power on detector 2 2 Filters ordered according to: 20, 25
AXIS Length Description 1 45 Index for in-band optical power on detector 2 2 Filters ordered according to: 60, 100
AXIS Length Description 1 45 Index for in-band optical power on detector (see section A.1) 2 7 Filters ordered according to (see section A.1): 90(backup), 70, 60, 80, 90, 105, 90
AXIS Length Description 1 45 Index for in-band optical power on detector 2 5 Filters ordered according to (see section A.1): 170, 200, 180, 150, 120
ISOPHOT Data Users Manual, Version 4.1, SAI/95-220/Dc
for P1, P2, and P3.