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Compute Instrument Settings for Conventional Data

STAR*NET Online Utilities
Instrument settings are used to constrain measurements in your STAR*NET project. They may be computed from procedural testing. Most commonly they are approximated from instrument specifications and what you know about your procedures and equipment. Answer the questions below and this utility will provide you with approximate values you can use to constrain your measurements.


Select options for angular and directional measurements. Always select "1" for "Number of Sets" UNLESS you are inputting values that were averaged from multiple observations. If your project includes more than one type of averaging procedure you may need to use an instrument library.


Number of Sets: What's This?

DMS Gons

Instrument Specifications:


Enter values from your instrument specifications or from a recent instrument calibration report.

DIN 18723 or ISO 17123 Directional Accuracy: Instrument directional accuracy from manufacturer specifications:
What's This?
Seconds/Milligons

EDM Constant: EDM constant from manufacturer specifications
What's This?
Meters/Feet

EDM PPM: EDM PPM from manufacturer specifications
What's This?
Parts per million


Other Specifications:

The following values may be approximated, computed, read from specifications or left at default

Azimuth/Bearing Accuracy: Approximate value for constraining Azimuth/Bearing entries:
What's This?
Seconds/Milligons

Instrument Centering Error: Centering Error for instrument optical or laser plummet:
What's This?
Meters/Feet

Target Centering Error: Centering Error of target tribach optical plummet or rod centering method:
What's This?
Meters/Feet

ATR Centering Error: Centering Error of target recognition system:
What's This?
Meters/Feet

Vertical Centering Error: Error allowable for Instrument and Target Height Measurement:
What's This?
Meters/Feet