基于多源测高卫星的日本海域平均海面高模型建立

Establishment of an Average Sea Surface Height Model Based on Multi-source Altimeter Satellites in Japan

平均海面模型是研究海图基准及海平面化的重要参考。经过数据预处理、重复周期观测数据共线平差、非重复周期观测数据海面时变校正、多种卫星测高数据联合交叉点平差、海面高格网化等几个环节,利用1993—2012年近20年的测高数据,建立日本海域(30°~45°N、130°~145°E)2′×2′网格分辨率的平均海平面模型(Japan Mean Sea Surface,JPMSS),与WHU2013、CLS15、DTU18三种全球平均海面高模型以及TP(Topex/Poseidon)/J1(Jason-1)/J2(Jason-2)平均参考框架,进行比较分析,结果显示,在研究区域内,JPMSS相比于其他模型误差最小,精度较为可靠。

The average sea surface model is an important reference surface for the study of chart datum and sea levelization.In this paper,it introduced the workflow,including data preprocessing,collinear adjustment of repeated periodic observation data,sea surface time-varying correction of non-repetitive periodic observation data,joint cross-point adjustment of multiple satellite altimetry data,and sea surface high gridding.A mean sea level model(Japan Mean Sea Surface,JPMSS)was established with grid resolution of the sea area of Japan(30°N~45°N,130°E~145°E)using altimetry data in the past 20 years from 1993 to 2012.Compared with WHU2013,CLS15,DTU18 three global average sea surface height models,TP/J1/J2 average reference frame in the study area,JPMSS was proved to have the smallest error and most reliable accuracy.