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

15.5. PREPARED DATA STRUCTURE (PDS) 183
subfield description reference or type
.RA RASTER RA of MOSAIC centre Section 15.2.3.13
.DEC RASTER DEC of MOSAIC centre Section 15.2.3.14
.ANGLE RASTER spacecraft ROLL Section 15.2.3.15
.RASTER ORIENTATION orientation reference Section 15.2.3.6
.RASTER ROTATION rotation w.r.t. celestial axes Section 15.2.3.7
.M STEPCOL M step size of raster Section 15.2.3.4
.N STEPLINE N step size of raster Section 15.2.3.5
.RASTERCOL no. of pointings in Section 15.2.3.2
M direction
.RASTERLINE no. of pointings in Section 15.2.3.3
N direction
.NX RASTER no. of columns in MOSAIC integer
.NY RASTER no. of lines in MOSAIC integer
.RMSRASTER RMS error on MOSAIC fltarr(.nx raster,.ny raster)
.NPIXRASTER no. of IMAGE pixels fltarr(.nx raster,.ny raster)
per MOSAIC pixel
.RASTER MOSAIC image fltarr(.nx raster,.ny raster)
.RASTER UNIT MOSAIC units string
15.5.5 BS PDS
The BS PDS is a beam-switch observation dedicated data structure. Its substructures and fields
are listed below. You will notice that the BS PDS is almost identical to the raster PDS. This is
purely for reasons of simplicity and compatibility of previously written processing routines:
• .CAL-G – see Section 15.5.6.
• .CCIM – see Section 15.5.8.
• .INFO – see Section 15.5.7.
• .ASTR – see Section 15.5.9.
• Standard PDS fields of Section 15.5.1.
• BS PDS specific fields: These fields are listed in the table below, along with a brief
description and where appropriate a reference to the SSCD or SCD field where the data
originates, or otherwise, the type of the data in the field. Again you will see similarities
with the architecture of the raster PDS – some fields common to both have fixed values.
Note that the MOSAIC in this case is the source−reference EXPOSUREs.