山东国土资源
山東國土資源
산동국토자원
ShangDong Land and Resources
2015年
9期
90-93
,共4页
RTK%水深测量%多波束%椭球高%正常高%高程数据处理
RTK%水深測量%多波束%橢毬高%正常高%高程數據處理
RTK%수심측량%다파속%타구고%정상고%고정수거처리
RTK%multibeam%ellipsoid height%normal height%elevation data processing
利用 RTK 进行多波束水深测量时,GPS 高程在提供瞬时垂直基准方面起着重要的作用。海上实际作业过程中,GPS 信号经常会发生失锁现象,造成部分历元高程数据突变,导致海底地形失真。该文以茂名某项目为例,首先介绍了根据 EGM2008大地水准面模型,利用高程拟合法将多波束水深测量时 GPS 椭球高转换为正常高的方法；然后针对 GPS 信号失锁现象,提出了利用 RTK 高程中的固定解来求算海水潮位面的方法,同时阐述了该方法的优势。
利用 RTK 進行多波束水深測量時,GPS 高程在提供瞬時垂直基準方麵起著重要的作用。海上實際作業過程中,GPS 信號經常會髮生失鎖現象,造成部分歷元高程數據突變,導緻海底地形失真。該文以茂名某項目為例,首先介紹瞭根據 EGM2008大地水準麵模型,利用高程擬閤法將多波束水深測量時 GPS 橢毬高轉換為正常高的方法；然後針對 GPS 信號失鎖現象,提齣瞭利用 RTK 高程中的固定解來求算海水潮位麵的方法,同時闡述瞭該方法的優勢。
이용 RTK 진행다파속수심측량시,GPS 고정재제공순시수직기준방면기착중요적작용。해상실제작업과정중,GPS 신호경상회발생실쇄현상,조성부분역원고정수거돌변,도치해저지형실진。해문이무명모항목위례,수선개소료근거 EGM2008대지수준면모형,이용고정의합법장다파속수심측량시 GPS 타구고전환위정상고적방법；연후침대 GPS 신호실쇄현상,제출료이용 RTK 고정중적고정해래구산해수조위면적방법,동시천술료해방법적우세。
In the period of measuring multi-beam by using RTK technology,GPS elevation plays an im-portant role in providing instantaneous vertical datum.During the actual operation process in the sea,GPS signals often happen the problem of out of lock.It will cause mutations of some epoch elevation data,and distortion of submarine topography.In this paper,setting Maoming project as an example,according to EGM2008 geoid model,by using elevation fitting method,in the process of measuring multibeam bathy-metric,GPS ellipsoidal height will convert to normal height.Then pointing to the phenomenon of losing and locking GPS signals,the method of using elevation fixed solution to calculate sea tide surface by using RTK technology has been put forward.The advantages of this method have been explained as well.
