PDS_VERSION_ID        = PDS3
RECORD_TYPE           = "STREAM"

OBJECT                = TEXT
  PUBLICATION_DATE    = 2006-03-01
  NOTE                = "Description of the CALIB directory"
END_OBJECT            = TEXT
END
Description of the CALIB directory at PSA level 4

4.1 Introduction

The CALIB directory contains 4 calibration files available in the PDS3 format:
- The pixel to wavenumber calibration file
- The AOTF frequency to wavenumber calibration file
- The AOTF transfer function calibration file
- The Blaze function calibration file.
Each file is accompanied with a CAT file, in the PDS3 format.

4.2 Pixel to wavenumber calibration file

The pixel to wavenumber calibration data are given in the PIX_WN.TAB file.
This file is made of 6 columns, the first one giving the relation type (pixel
to wavenumber - PIX->WN - or wavenumber to pixel - WN->PIX). The relations are
defined in Section 2.2.
The second column gives the binning case and the third one the bin number.
Table 1 summarizes the detector lines that are summed up for each case and
Table 2 gives the different binning cases.

Detector line number Binning case
 8 x 3 8 x 4 2 x 12 2 x 16
187 - 1 - 1
188 - 1 - 1
189 - 1 - 1
190 - 1 - 1
191 1 2 1 1
192 1 2 1 1
193 1 2 1 1
194 2 2 1 1
195 2 3 1 1
196 2 3 1 1
197 3 3 1 1
198 3 3 1 1
199 3 4 1 1
200 4 4 1 1
201 4 4 1 1
202 4 4 1 1
203 5 5 2 2
204 5 5 2 2
205 5 5 2 2
206 6 5 2 2
207 6 6 2 2
208 6 6 2 2
209 7 6 2 2
210 7 6 2 2
211 7 7 2 2
212 8 7 2 2
213 8 7 2 2
214 8 7 2 2
215 - 8 - 2
216 - 8 - 2
217 - 8 - 2
218 - 8 - 2

Table 1: List of detector line numbers for each bin of each binning case

Binning case Number of lines per bin Number of binning groups
8 x 3 3 8
8 x 4 4 8
2 x 12 12 2
2 x 16 16 2

Table 2: List of the binning possibilities

The three last columns give the values of the second order polynomial
coefficients.
There is one calibration file for the nominal mission, and for each extension
of the mission.

4.3 The AOTF frequency to wavenumber calibration file

The AOTF frequency to wavenumber calibrations are given in the AOTF_F_WN.TAB
with its associated LBL file.
This file is made of 6 columns, the first one giving the relation type (AOTF
frequency to wavenumber - F->WN - or wavenumber to AOTF frequency - WN->F).
The relations are defined in Section 2.3. The second column gives the binning
case and the third one the bin number. Table 1summarizes the detector lines
that are summed up for each case and Table 2 gives the different binning
cases.
The three last columns give the values of the second order polynomial
coefficients.
There is one calibration file for the nominal mission, and for each extension
of the mission.

4.4 The AOTF transfer function calibration file

The AOTF transfer function values are given in the AOTF_F_WN.TAB with its
associated LBL file.
The first column gives the diffraction order number, followed by the centered
wavenumber values (between -100 and 100 cm-1 around the maximum, by steps of
0.1cm-1, 2001 in total), the transfer function values for bin 1(2001 in total)
and the transfer function values for bin 2 (2001 in total).
There is one line per order (94 in total).

4.5 The blaze function calibration file

The blaze function values are given in the BLAZE.TAB with its associated LBL
file.
The first column gives the diffraction order number, followed by the centered
wavenumber values (between -100 and 100 cm-1 around the center of the order,
by steps of 0.1cm-1, 2001 in total) and the blaze function values (2001 in
total).
There is one line per order (94 in total).