Some key points of submarine control network measurement and calculation

doi:10.11947/j.AGCS.2019.20190157

Abstract

Abstract: Several problems affecting the positioning accuracy of the submarine control network are analyzed. It is considered that the ocean sound velocity changes greatly in a short time and the regularity is not strong. Constructing the sound velocity field is an effective way to weaken the representative error of the sound velocity. The influence of sound velocity on the location is also related to the beam incident angle and depth. The impact is significant and cannot be ignored. In the sound-stable waters, when the incident angles are approximately the same, high accuracy can be achieved by differential positioning with observation distance, otherwise the accuracy is difficult to guarantee. The depth or depth difference provided by the pressure sensor is introduced to improve the vertical solution precision of the control network, but the difference of tide height between two control points should be taken into account.

Key words: submarine control network, positioning precision, sound velocity, differential positioning, depth constraint

CLC Number:

P227

ZHAO Jianhu, LIANG Wenbiao. Some key points of submarine control network measurement and calculation[J]. Acta Geodaetica et Cartographica Sinica, 2019, 48(9): 1197-1202.

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