Create Calibration from File

Use the Gravity > Calibration > Create Calibration from File menu option (GRCALFILE GX) to create a calibration table file from an existing calibration data file that is in some other format.

Format a Calibration Table from a File dialog options

Existing calibration data file	Specify the name of an existing calibration ASCII data file that may be in any format. The contents of this file will be appended to a template of the required file format. If you leave this entry blank, or if this file does not exist, you will see a template only.
Instrument ID	Specify the Instrument ID, which is usually just the instrument number (G237 for example). A calibration file will be created using this name with the extension ".csv". If a calibration file exists, you will be asked if you want to replace the file.

Application Notes

Calibration tables are often formatted into two columns of instrument reading and the calibrated milligal equivalent. If you have an existing calibration data in this format, this GX will create a template for a Geosoft compatible file and append the contents of your file. You can then edit your information to the specification of the template.

A calibration file is a standard Geosoft ASCII comma-delimited table file, which contains the following columns: "Instrument", "Milligal", and "Scale".

Example:

/ Gravity calibration file: .\105.csv

/ Survey date: 1988/11/14

/ Instrument: G 123

/ Survey database: .\Nov14.gdb

/ Base station database: .\bases2.gdb

/

Instrument, Milligal, Scale 

5090.5705, 981200.0819, * 

5098.0000, 981210.0840, 1.34 

5110.0000, 981220.0836, 1.34 

5122.0000, 981230.0833, 1.34 

5133.0000, 981240.0830, 1.34 

5144.0000, 981250.0827, 1.34