Assessing the Performance of the Phase Difference Bathymetric Sonar Depth Uncertainty Prediction Model

Assessing the Performance of the Phase Difference Bathymetric Sonar Depth Uncertainty Prediction Model

Mohammadloo, Tannaz H. (TU Delft Aircraft Noise and Climate Effects)
Geen, Matt (ITER)
Sewada, Jitendra S. (ITER)
Snellen, M. (TU Delft Aircraft Noise and Climate Effects)
Simons, D.G. (TU Delft Aircraft Noise and Climate Effects)

2022

Realistic predictions of the contribution of the uncertainty sources affecting the quality of the bathymetric measurements prior to a survey is of importance. To this end, models predicting these contributions have been developed. The objective of the present paper is to assess the performance of the bathymetric uncertainty prediction model for Phase Difference Bathymetric Sonars (PDBS) which is an interferometric sonar. Two data sets were acquired with the Bathyswath-2 system with a frequency of 234 kHz at average water depths of around 26 m and 8 m with pulse lengths equal to 0.0555 ms and 0.1581 ms, respectively. The comparison between the bathymetric uncertainties derived from the measurements and those predicted using the current model indicates a relatively good agreement except for the across-track distances close to the nadir. The performance of the prediction model can be improved by modifying the term addressing the effect of footprint shift, i.e., spatial decorrelation, on the bottom due to fact that at a given time the footprints seen by different receiving arrays are slightly different

predicted bathymetric uncertainty
baseline decorrelation
spatial decorrelation
additive noise contribution
measured bathymetric uncertainty
Phase Difference Bathymetric Sonars

http://resolver.tudelft.nl/uuid:f9cd292f-aa34-497a-868a-3488c66006d5

https://doi.org/10.3390/rs14092011

2072-4292

Remote Sensing, 14 (9)

Institutional Repository

journal article

© 2022 Tannaz H. Mohammadloo, Matt Geen, Jitendra S. Sewada, M. Snellen, D.G. Simons