PDS_VERSION_ID = PDS3
LABEL_REVISION_NOTE = "2018-08-30 IR: 6.0"
RECORD_TYPE = STREAM
OBJECT = TEXT
PUBLICATION_DATE = 2018-08-30
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
INFCAL_OFF__IB_20180305_009.ASC
INFCAL_OFF__IB_20180305_009.LBL
INFCAL_OFF__OB_20180305_009.ASC
INFCAL_OFF__OB_20180305_009.LBL
INFCAL_PARA_IB_20180305_009.ASC
INFCAL_PARA_IB_20180305_009.LBL
INFCAL_PARA_OB_20180305_009.ASC
INFCAL_PARA_OB_20180305_009.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) INFCAL_PARA_IB_20180305_009.ASC
6) INFCAL_PARA_OB_20180305_009.ASC
7) INFCAL_OFF__IB_20180305_009.ASC
8) INFCAL_OFF__OB_20180305_009.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 four Inflight Calibration
Files (INFCAL_) for Temperature Model 009 are used. The two INFCAL_PARA
files contain offset and s/c-residual field jumps at certain times. The
value behind the related timestamp is valid as long the time is earlier as
the time of the next timestamp listed in the file.
Offset values are stated in Nanotesla and instrument coordinates.
The INFCAL_OFF files contain the nonlinear temperature
model for the sensor offset. Values are given in Kelvin and Nanotesla using
instrument coordinates as well.
All values have been computed using an optimization software
developed for this purpose. At certain times, where an automatic finding of
coefficients was not possible, the results were improved by manual tweaking.
For details of the offset improvement and s/c-interference please refer to the
documentation provided in the DOCUMENT directory.
All files are needed and read by the IDL pipeline s/w dds2pds.
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