Sensor Offset Correction

Use the Moving Platform Gravity > Navigation Corrections > Offset Correction menu option, (geogxnet.dll(Geosoft.GX.Gravity.OffsetCorrection;Run)*), to calculate the true X, Y, Z coordinates of a sensor, located at a fix offset from the GPS receiver. This dialog operates on the current database and expects that the X,Y,Z channels are assigned.

Offset Correction dialog options

Sensor offset in direction of travel

Specify the distance of the sensor ahead (positive) or behind (negative) to the GPS receiver, relative to the line direction.

Script Parameter: GRAVITY_OFFSET_CORRECTION.OFFSET_ALONG

Sensor offset across direction of travel

Specify the offset distance of the sensor perpendicular to line direction (positive to right, negative to left, relative to line direction).

Script Parameter: GRAVITY_OFFSET_CORRECTION.OFFSET_ACROSS

Sensor vertical offset

Specify the vertical offset distance of the sensor above (positive) or below (negative) to the GPS receiver, relative to the line direction.

Script Parameter: GRAVITY_OFFSET_CORRECTION.OFFSET_VERTICAL

Application Notes

*The GX tool will search in the "...\Geosoft\Desktop Applications \gx" folder. The GX.Net tools, however, are embedded in the geogxnet.dll located in the "...\Geosoft\Desktop Applications \bin" folder. If running this GX interactively, bypassing the menu, first change the folder to point to the "bin" folder, then supply the GX.Net tool in the specified format.

The Offset Correction dialog calculates the new X,Y,Z coordinates and sets them as the assigned coordinates. The new channel names are set as the existing channels suffixed by '_offset'.