Abstract

Accurate and precise timekeeping between computers in a distributed survey system is essential to ensure adequate data quality, especially with Multibeam Echosounders (MBES) which can otherwise suffer from significant motion artefacts. We show that clock synchronisation on the order of 100-150ns (rms) is readily achievable in a modern MBES-based survey system utilising an Ethernet-based time synchronisation mechanism and some custom timekeeping software. We also show that improving the timekeeping eliminates motion artefacts in the observed bathymetry, and simplifies the patch-test procedure.

Publication Date

4-2008

Journal or Conference Title

International Hydrographic Review

Volume

9, No. 1 April 2008

Pages

9-24

Publisher Place

Lemmers, Amsterdam, The Netherlands

Publisher

International Hydrographic Organization

Document Type

Journal Article

Share

COinS