摘要
用于消除交叉点测量误差的平差法、高度计海况偏差校正及大地水准面模型的建立等都以轨迹交叉点数据为基础,找到一种高效且精确确定交叉点位置的方法十分重要。以Jason-1卫星高度计为例,设计了11种弧段分段类型并据此进行拟合以确定交叉点的精确位置,从获取有效交叉点的数量和效率两方面分析,采用12段的分段拟合方法效果最优。不同倾角卫星地面轨迹会发生变化,分段节点需要根据轨迹曲线特征作适当调整。分段设计方案及最优分段选取方法对任何倾的卫星依然适用。
It is the crossover data of ground track that could be applied as adjustment method to deduce crossover measurement error and establish sea state bias correction model and geoid model. It is important to figure out an effective and precise method to determine the crossover locations. Jason-1 altimeter is taken for example to design 11 types of segmenting of arc sections to fit to determine the crossover locations. The result indicates that the ]2 segmenting type is the optimal one because of the available of crossover points and the calculating efficiency. Since the ground tracks may change with the different inclinations of altimeters, so it is required for the segmentation nodes to adapt to the characteristics of tracks, The design schemes and the optimal segmenting method can commonly be applied to any inclination altimeters.
出处
《测绘学报》
EI
CSCD
北大核心
2012年第6期811-815,共5页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金(41176157)
海洋公益性科研专项经费(201105032-1)
关键词
卫星地面轨迹
交叉点
分段拟合
高度计
ground track of satellite
crossover
piecewise fitting
satellite altimeter
