Terrestrial laser scanner calibration and performance evaluation using the network method.

Area of Science:

• Geomatics Engineering
• Metrology
• Geospatial Technology

Background:

• Terrestrial laser scanners (TLSs) require accurate error model calibration and performance evaluation.
• These procedures typically rely on a network of stationary targets with known coordinates.
• The necessity of using a higher-accuracy instrument, like a laser tracker (LT), for network calibration is debated.

Purpose of the Study:

• To investigate whether a TLS is sufficient for calibrating its own error model and evaluating performance.
• To determine the conditions under which a TLS can be used for network calibration versus when an LT is required.
• To provide guidance on selecting the appropriate instrument for network calibration.

Main Methods:

• Utilizing a network of stationary targets for calibration and evaluation.
• Performing multi-position measurements from the TLS to average systematic errors.
• Comparing calibration results obtained using TLS versus LT for network target coordinates.

Main Results:

• The study explores the suitability of TLS for network calibration.
• Guidance is provided on when TLS is adequate and when LT is necessary.
• The findings aim to optimize the calibration and evaluation process for TLS.

Conclusions:

• TLS can be sufficient for network calibration under certain conditions.
• The choice between TLS and LT depends on the required accuracy for performance evaluation.
• This research aids in efficient and accurate TLS calibration and validation.