PDS_VERSION_ID = PDS3
LABEL_REVISION_NOTE = "2015-12-15 IR: 5.0"
RECORD_TYPE = STREAM
OBJECT = TEXT
PUBLICATION_DATE = 2015-12-15
NOTE = "
This file describes the content of the CALIB directory
"
END_OBJECT = TEXT
END
***** File CALINFO.TXT ******
Contents of the CALIB Directory
RPCMAG_SC_ALIGN.ASC
RPCMAG_SC_ALIGN.LBL
RPCMAG_GND_CALIB_FSDPU_FMIB.ASC
RPCMAG_GND_CALIB_FSDPU_FMIB.LBL
RPCMAG_GND_CALIB_FSDPU_FMOB.ASC
RPCMAG_GND_CALIB_FSDPU_FMOB.LBL
RPCMAG_INFLIGHT_08_CALIB_IB.ASC
RPCMAG_INFLIGHT_08_CALIB_IB.LBL
RPCMAG_INFLIGHT_08_CALIB_OB.ASC
RPCMAG_INFLIGHT_08_CALIB_OB.LBL
RPCMAG_BOOM_ALIGN_CORR_EF1.ASC
RPCMAG_BOOM_ALIGN_CORR_EF1.LBL
The CALIB directory contains all necessary information to generate
calibrated magnetic field values from the Inboard (IB) and the
Outboard (OB) sensor.
The following file are needed
1) RPCMAG_SC_ALIGN.ASC
2) RPCMAG_BOOM_ALIGN_CORR_EF1.ASC
3) RPCMAG_GND_CALIB_FSDPU_FMIB.ASC
4) RPCMAG_GND_CALIB_FSDPU_FMOB.ASC
5) RPCMAG_INFLIGHT_08_CALIB_IB.ASC
6) RPCMAG_INFLIGHT_08_CALIB_OB.ASC
The first file contains the rotation matrices to turn the magnetic field
vector from instrument coordinates to s/c-coordinates. There
are two matrices for each sensor: one for the stowed boom and one for
the deployed boom position. The second file is used to correct the sensor
orientation using the analysis result from the first Earth Flyby. By
comparison with the POMME Earth magnetic field model it turned out, that the
sensors have to be rotated by some hundredths of a degree to get the best
accordance with the model.
The two GND files contain all information to calculate the
temperature dependent sensitivity, misalignment and offset of the
IB and OB sensors (FM units) connected to the Flight-spare (FS) DPU.
This correction is based on Ground Calibration Results.
For an improvement of the calibration the two Inflight Calibration
File for Temperature Model 008 are used. These two files (calculated
on daily bases) contain the actual Temperature correction polynomial
for the sensor offsets.
The temperature calibration model is still under development in order
to adapt all effects seen during the quasi-continuous operations at CG.
Temperature files are provided for every day, although they can
contain the same coefficients. Temperature effects will be recalibrated
after end of mission when also more spacecraft disturbances will be
identified and a common calibration model can be set up.
All files are read by the IDL s/w gen_cal_data.pro
The GND calibration algorithm is described in the Calibration Analysis
report Ro-IGM-TR-0003 (Chapters 7 -9),
which can be found in the document directory. The Inflight calibration
is described in the EAICD.
The complete calibration is described in the document RO-IGEP-TR0028 :
Step by Step calibration procedure