ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

54 CHAPTER 8. POLARIZATION OBSERVATION (CAM05/DEDICATED CAM99)
8 POLARIZOR 1 OBS LW2 3.0 2.10 1 78 2 2
9 POLARIZOR 1 OBS LW2 3.0 2.10 1 64 1 2
10 POLARIZOR 1 OBS LW2 3.0 2.10 1 78 1 2
11 POLARIZOR 1 OBS LW2 3.0 2.10 1 78 1 2
3. Clearly from the above listing sscd polar1 contains only those SCDs with the entrance
wheel set to POLARIZOR 1. However, for each of the 4 raster positions we have 3 SCDs.
To merge these 4 triplets we can use scd concatene:
CIA> tmp = scd_concatene( scds[0], scds[1] )
CIA> scd_del, scds[0] & scd_del, scds[1]
CIA> scd0 = scd_concatene( tmp, scds[2] )
CIA> scd_del, tmp & scd_del, scds[2]
CIA> tmp = scd_concatene( scds[3], scds[4] )
CIA> scd_del, scds[3] & scd_del, scds[4]
CIA> scd1 = scd_concatene( tmp, scds[5] )
CIA> scd_del, tmp & scd_del, scds[5]
CIA> tmp = scd_concatene( scds[6], scds[7] )
CIA> scd_del, scds[6] & scd_del, scds[7]
CIA> scd2 = scd_concatene( tmp, scds[8] )
CIA> scd_del, tmp & scd_del, scds[8]
CIA> tmp = scd_concatene( scds[9], scds[10] )
CIA> scd_del, scds[9] & scd_del, scds[10]
CIA> scd3 = scd_concatene( tmp, scds[11] )
CIA> scd_del, tmp & scd_del, scds[11]
And now we have a more usefully arranged SSCD.
CIA> sscd_info, sscd_polar1, /pol
4 SCDs in the SSCD: CSSC000000POLAR1_00020118111300
seq entwhl mode fltrwhl pfov tint gain size m_raster n_raster
0 POLARIZOR 1 OBS LW2 3.0 2.10 1 234 1 1
1 POLARIZOR 1 OBS LW2 3.0 2.10 1 230 2 1
2 POLARIZOR 1 OBS LW2 3.0 2.10 1 226 2 2
3 POLARIZOR 1 OBS LW2 3.0 2.10 1 220 1 2
For other entrance wheel settings, e.g. POLARIZOR 2, return to Step 2 and create another
SSCD, e.g. sscd polar2.
8.2.4 Freeze the data in a PDS
The SSCD sscd polar1 appears to contain data from a regular raster, hence we use a raster PDS:
CIA> pds_polar1 = get_sscdraster( sscd_polar1 )
Reduce the IMAGEs to EXPOSUREs in the usual way:
CIA> reduce, pds_polar1