Geometrics MetalMapper 2x2 Operation Manual page 48

GateCenters = fixed for static or dynamic measurements
GateWidths = fixed for static or dynamic measurements
GeoID = taken from csv project file naming convention
GeodeticDatum = WGS84 used for Lat/Lon to UTM conversion
HeightOfTransmitterAssemblyAboveGround = measured from ground to bottom of coils
HeightOfZCoilCenterAboveTransmitterAssembly = measured from bottom of coils to center
Holdoff = time between transmitter turn-off and receiver measurement
Inversion = results from in-field inversion, only included on SAM measurement types
{ "Status": 0,
"Input file": SAM measurement used to compute the in-field single target inversion
"Background file: SBG file used to level the SAM data. It is the most recently collected SBG in
the same GeoID directory as the SAM file inverted.
"Coherence": a measure of the how well the model data match the observed data for all
Transmitter (TX) and Receiver (RX) combinations. Calculated as the Correlation Coefficient
squared.,
"FitX": , "FitY": , "FitZ": , distance (m) from the sensor coil center to source location in each
X,Y,Z direction. Z positive being up.
"Pol.1": , "Pol.2": , "Pol.3": , Principal, Secondary, and Tertiary axes magnetic polarizability
"Magnitude": XY distance (m) from coil center to inverted source location
"Direction": compass direction (degrees) clockwise from positive Y to inverted source location.
}
LogarithmicallyDecimated = 1=true, 0=false. If true later time gates are longer than early
time gates.
MagneticDeclination = Computed from GPS data, yaw is corrected by declination.
Computed using WMM-2015 data set from NOAA.
MaximumBackgroundVariation = QC parameter for SBG reference function
MeasurementNumber = count from 000. If measurements are repeated this number
increments
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