Klein Marine Systems, Inc. HYDROCHART 3500, Руководство по эксплуатации и обслуживанию

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Bathymetric System Calibration and Patch Test
3-13
3.10.5 Yaw Bias Test
For the yaw bias test the objective is to determine azimuth offset error between the
motion reference unit and the sonar arrays. For this test it is recommended that the
survey vessel run two pairs of adjacent lines on reciprocal headings over a flat
bottom with a prominent bathymetric feature, such as the edge of a ship channel.
The adjacent lines should overlap by 10–20%. In computing the azimuth offset, the
data from the reciprocal lines can be used to remove any roll offset. The parallel
lines run in a direction normal to the bottom feature can be used to compute the
azimuth offset using several measurements of the across-track displacement.