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WorkHorse Monitor/Sentinel Deployment Guide
To post calibrate the
data:
1. Use TRDI Toolz to download the data from the CompactFlash recorder. For example, the pd0 data
file is named _RDI_000.000 and the _RDI_000.cal is the post calibration file and both files are down-
loaded to the same folder.
2. Start the Compass Post Calibration software and click the Menu button to select the PD0 data file
(*.000).
3. Compass Post Calibration will create the filename.postcal.txt and filename.postcal.000 files. The
original raw data is not changed. Use the filename.postcal.000 file to view the data with the post
compass calibration correction applied.
The *.cal file is created during data collection and is recorded to the CompactFlash recorder
with the *.000 pd0 data file.
Post calibration relies upon the instrument moving sufficiently the during the deployment to
collect "raw magnetometer" data for the heading coverage. If the *.cal file did not have
sufficient heading coverage, then the post calibration will fail to converge.
EAR99 Technology Subject to Restrictions Contained on the Cover Page.
P/N 957-6285-00 (July 2023)
Page 19
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