Unstable Object Points during Measurements-Deformation Analysis Based on Pseudo Epoch Approach

Area of Science:

• Geodesy
• Geotechnical Engineering
• Structural Health Monitoring

Background:

• Deformation analysis is crucial for monitoring ground and engineering structures.
• Traditional methods rely on geodetic measurements over multiple epochs.
• Sudden point displacements within an epoch pose challenges for standard analysis.

Purpose of the Study:

• To investigate methods for analyzing sudden point displacements in geodetic networks.
• To compare M_split estimation with robust methods for handling pseudo-epochs.
• To determine the most effective approach for modeling dynamic changes in geodetic networks.

Main Methods:

• Examination of M_split estimation technique.
• Application of robust estimation methods.
• Analysis of hypothetical observation sets with unknown epoch divisions (pseudo-epochs).

Main Results:

• M_split estimation provides two sets of network point coordinates: pre- and post-displacement.
• This dual-coordinate output effectively visualizes dynamic changes.
• Empirical analyses indicate M_split estimation yields superior and more realistic outcomes compared to other methods.

Conclusions:

• M_split estimation is a highly suitable method for analyzing sudden point displacements in geodetic monitoring.
• The method enhances the understanding of dynamic network changes.
• It offers improved accuracy and realism in deformation analysis results.