拖缆综合导航数据后处理质量控制

Qualitycontrol of Towing Integrated Navigation Data Post-processing

在海上拖缆采集作业中,电缆形状和位置的计算有着重要的意义。在实时导航时,需要它显示共中心点位置、控制面元覆盖和判断电缆水下状态;在导航数据后处理时,需要依靠它计算电缆各检波点的位置。海上施工中,由于天气状况不佳、定位信号不稳、设备通讯问题和躲避障碍物等原因,原始的定位导航数据会记录一些突变的或者错误的数据,不能直接使用。必须对原始数据进行后处理,得到更加合理准确的定位数据,并根据产生的相关质控数据对施工质量进行监控。本文结合海上多个拖缆采集作业实例,深入分析了综合导航后处理的流程和参数选择原则,提出了质量控制的关键点,具有一定的借鉴和推广价值。

In towing streameracquisition at sea,calculation of cable shape and location is very important.In real-time navigation,needs itdisplay the CMP,control surface coverage and determine the state of cable underwater;In the post-processing of navigation data,rely on it to calculate the location of each hydrophone on the cable.In offshore construction,due to several reasons such as the poor weather conditions,instability of positioning signal,quick fix for the rudder,equipment communication problems and avoiding obstacles,original navigation and positioning data could record some mutations or wrong data,and these cannot be used directly.The original data post-processing must be carried out to get more reasonable and accurate positioning data,and according to the relevant quality control data to monitor the construction quality.This paper presents several examples of towing collection workat sea,analyzes the integrated navigation post-treatment process and parameter selection principle deeply,puts forward the key points of quality control,and has a certain reference and promotion value.