93 GSM19 Series Magnetometers - Version 7
GEM Systems, Inc. Advanced Magnetometers
For more technical information, visit www.gemsys.ca
APPENDIX B: RAW DATA FILES TRANSMITTED BY RS-232-C
Data is sent via the unit’s serial link to a printer or a host computer in a standard ASCII format.
The data comes as a stream of unlabelled numbers that varies with the survey mode that was
employed. Slow modes have a more extensive header, including column identifiers. Each case is
described below.
B.1 MOBILE MODE
Data taken in mobile mode is sent through the Rs-232 port as follows:
corrected
time line station field (nT) field (nT)
122136.0 00000N 0000100E 57034.56 56977.87 99
122142.0 00000N 0000125E 57034.67 56977.84 99
Column 1:Time, as hhmmss.s(12h 21m 36.0s in row 1)
Column 2: Line number and direction
Column 3: Station number and direction
Column 4: Raw (unreduced data (nT)
Column 5: Reduced magnetic field data (nT)
Column 6: Signal Quality
B.2 BASE MODE
Base station data transmission is similar to that of mobile data, except for the exclusion of line and
station numbers. The transmission appears as follows:
time field/nT
125010.0 57756.28 99
125020.0 57756.12 99
Column 1: Time, as hhmmss.s
Column 2: Unreduced magnetic field data (nT)
Column 3: Signal Quality
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