多波束测深边缘波束误差的综合校正

边缘波束误差是影响多波束测深数据精度的主要因素,数据精度影响其可信度和使用范围,也是进行相关研究的基础.多波束勘测系统声呐参数的精确校正、勘测区声场模型的建立以及实时勘测海洋噪声的合理剔除是影响边缘波束数据质量的关键因素,严重时甚至导致勘测数据出现沿测线方向的条带状假地形或地形位置偏移.上述因素对多波束勘测数据的影响是一个综合作用的过程,靠单一的校正或编辑方法很难提高采集数据的精度.以多波束勘测原理和声学理论为指导,以多波束实测数据为研究基础和分析对象,运用GIS面向对象方法,全面分析造成多波束勘测大误差边缘波束的原因,并探寻改善已勘测多波束大误差数据、提高数据精度的综合处理方法,最终以可视化的方式实现人机交互处理.该项研究成果已初步应用于海洋项目总图编绘工作,并取得了预期效果.

Integrated error correction of multi-beam marginal sounding beam

The error of marginal beams mainly influences the quality of multi-beam sounding data. The precision of multi-beam sounding data influences their reliability and application, and it is the base of correlative study. The key control factors of marginal beams quality are accurate multi-beam sonar parameters, accurate sound profiles and sounding noises compilation. If inaccurate multi-beam sonar parameters or inaccurate sound profiles are used in flat area during the multi-beam survey, unreality submarine topography will be got such as belt along the survey line. It is difficult to improve the quality of multi-beam sounding data using single method during post-processing, because the error of multi-beam sounding is caused by different factors. On the basis of multi-beam survey principles and the acoustics theory, the multi-beam sounding error data have been researched and processed, the software of man-machine conversation to process the multi-beam error sounding data has been designed and estahlished with oriented-object method of GIS at last. The study result has been used in topographic mapping of marin project.