太阳时角法在超短基线静态校准中的应用

Static calibration of ultra-short baseline using solar azimuth

针对海洋工程测量作业工程船只自身的特殊性,导致对超短基线定位系统无法采用常规的动态校准方法这一问题,该文根据天文方位测量原理,结合全站仪高精度的角度测量和GPS定位及授时测量,对超短基线定位系统的发射接收机参考指向与船体中轴线之间的水平角度偏差进行静态校准。通过编制相应的校准程序,结合在海洋工程中的海底管线铺设中的应用进行验证,测量分析结果表明,超短基线定位系统静态校准方法满足水下导航定位施工作业的精度要求,取得了良好的实施效果。

The ultra-short baseline（USBL）needs to be calibrated before offshore engineering survey,the calibration accuracy directly affects the precision of USBL.Because of the particularity of barge itself,USBL cannot use dynamic calibration.According to the principle of astronomical azimuth survey,combining with total station instrument of high precision angle survey,GPS position and timing,the static calibration of the angle offset between USBL transceiver reference point and the barge axes was adopted.Coding calibration program,testifying application of the subsea pipeline installation project,the result of survey analysis showed that static calibration method of USBL satisfied the accuracy of underwater positioning,and got a good effect.