表层声速误差对多波束测深数据的影响分析

Analysis of Surface Sound Speed Errors on Multibeam Sounding Data

针对多波束水深测量中未明确定义表层声速限差范围,导致在数据采集过程中无法实时监控表层声速误差的问题,结合多波束数据采集与归算流程,分析并推导了SSP误差影响下的波束指向角与点位归算误差模型。结合数值计算,研究了不同水深下测深误差随SSP之间的变化规律与量级大小,从而针对SSP限差范围提出合理化建议,对提高数据质量具有一定应用价值。

The problem that the surface sound velocity difference range was not clearly defined in the multibeam sounding,which leads to the inability to monitor the surface sound speed error in real time during the data acquisition process.Combined with the multi-beam data acquisition and reduction process,the error model of beam direction angle and point position under the influence of SSP error is analyzed and deduced.Through numerical calculations,the variation law and magnitude of the sounding error with SSP under different water depths are studied,and reasonable suggestions are put forward for the SSP tolerance range,which has certain application value for improving data quality.