Improved techniques to resolve the water column sound speed structure for multibeam ray-tracing

Autor: Jean-Guy Nistad, Patrick Westfeld

Publikováno v: The International Hydrographic Review. 27:35-54

Multibeam bathymetry surveys conducted in highly stratified environments are routinely affected by sound speed errors. The approach proposed here aims to combine measured with synthetic sound speed profiles in order to minimize sound speed errors. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3002a79685b4f30b018a678001b6c3bd
https://doi.org/10.58440/ihr-27-a03

Machine learning for boulder detection in acoustic data

Autor: Peter Feldens, Svenja Papenmeier, Sören Themann, Agata Feldens, Patrick Westfeld

Sublittoral hard substrates, for example formed by blocks and boulders, are hotspots for marine biodiversity, especially for benthic communities. Knowledge on boulder occurrence is also important for marine and coastal management, including offshore

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::88a928108c4b203eb7242052e743d903
https://doi.org/10.5194/egusphere-egu22-1445

IMPROVEMENTS IN LIDAR BATHYMETRY DATA ANALYSIS

Autor: D. Mader, Hans-Gerd Maas, Patrick Westfeld, K. Richter

Publikováno v: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLII-2-W10, Pp 113-117 (2019)

Airborne Lidar Bathymetry is a laser scanning technique to measure waterbody bottom topography in shallow waterbodies with limited turbidity. The topic has recently gained relevance due to the advent of new sensor technologies allowing for much highe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61723b654da7632410f00cca0418ff5e
https://doi.org/10.5194/isprs-archives-xlii-2-w10-113-2019

NUMERICAL SIMULATION AND EXPERIMENTAL VALIDATION OF WAVE PATTERN INDUCED COORDINATE ERRORS IN AIRBORNE LIDAR BATHYMETRY

Autor: Hans-Gerd Maas, K. Richter, Patrick Westfeld, D. Mader

Publikováno v: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLII-2, Pp 961-967 (2018)

Airborne LiDAR bathymetry (ALB) requires a refraction correction on the basis of Snell’s law at the air-water interface and a speedof- light correction to be applied on the raw laser data in order to achieve a geometric accurate representation of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a407c7e2745643ba8a17bc1be0581b50
https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-2/961/2018/isprs-archives-XLII-2-961-2018.pdf

Analysis and correction of ocean wave pattern induced systematic coordinate errors in airborne LiDAR bathymetry

Autor: Robert Weiß, K. Richter, Hans-Gerd Maas, Patrick Westfeld

Publikováno v: ISPRS Journal of Photogrammetry and Remote Sensing. 128:314-325

This contribution investigates the effects of ocean wave patterns on 3D underwater point coordinate accuracy for LiDAR bathymetry. The refraction of the finite diameter laser pulse passing the air/water interface is modeled differentially in a strict

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::699691986c2eec99e2c3c752ffec7860
https://doi.org/10.1016/j.isprsjprs.2017.04.008