GNSS海洋浮标海面高程动态不确定度研究  

Study on Dynamic Uncertainty of Sea-Level Elevation Measured by GNSS Ocean Buoy

作　　者：梁冠辉 陶常飞 周兴华 刘同木 林冠英 黄桦 LIANG Guan-hui;TAO Chang-fei;ZHOU Xing-hua;LIU Tong-mu;LIN Guan-ying;HUANG Hua(First Institute of Oceanography, MNR, Qingdao 266061, China;South China Sea Branch, MNR, Guangzhou 510301, China)

机构地区：[1]自然资源部第一海洋研究所,山东青岛266061 [2]自然资源部南海局,广东广州510301

出　　处：《海洋科学进展》2020年第3期532-540,共9页Advances in Marine Science

基　　金：国家重点研发计划项目——海上搜寻演示验证技术与评估(2017YFC0306003)。

摘　　要：为全面准确地评定GNSS(Global Navigation Satellite System)海洋浮标测得瞬时海面高程的动态不确定度,根据GNSS海洋浮标的工作原理、系统组成及数据处理方法,提出了针对具体测量过程的瞬时海面高程动态不确定度评定方法。将浮标动态测量过程分解为静态测量过程的集合,采用GUM(Guide to the Expression of Uncertainty in Measurement)方法建立了测量模型,详细分析和计算了静态测量过程中瞬时海面高程的不确定度分量:GNSS高程不确定度、GNSS天线高程改正不确定度和高程异常不确定度,最后合成瞬时海面高程的动态标准不确定度和动态扩展不确定度。使用该方法对近海GNSS浮标测量结果进行了动态不确定度评定,验证了此方法的可行性,也为评价GNSS浮标测量结果质量提供了有效依据。In order to evaluate comprehensively and accurately the dynamic uncertainty of instantaneous sea-level elevation measured by GNSS(Global Navigation Satellite System)ocean buoy,a method for evaluating the dynamic uncertainty of instantaneous sea-level elevation measured in specific measurement processes is proposed based on the working principle,system composition and data processing method of GNSS ocean buoy.The dynamic measurement process of the buoy is decomposed into a set of static mea-surement processes and a measurement model is established by using GUM(Guide to the Expression of Uncertainty in Measurement)method.The uncertainty components of the instantaneous sea-level elevation measured in the static measurement process,which include GNSS elevation uncertainty,GNSS antenna elevation correction uncertainty and elevation anomaly uncertainty,are analyzed and calculated in detail.Finally,the dynamic standard uncertainty and the dynamic expanded uncertainty of the instantaneous sea-level elevation are synthesized.This method has been used for evaluating the dynamic uncertainty of the results measured by GNSS buoy in the offshore areas,verifying the feasibility of the method and providing an effective base for evaluating of the quality of the GNSS buoy measurements.

关 键 词：GNSS 瞬时海面高程 浮标 动态不确定度 姿态测量 

分 类 号：P715.2[天文地球—海洋科学] P229.5