地矿测绘
地礦測繪
지광측회
Surveying and Mapping of Geology and Mineral Resources
2015年
3期
3-6
,共4页
最小二乘配置%高程拟合%高程异常%随机变量
最小二乘配置%高程擬閤%高程異常%隨機變量
최소이승배치%고정의합%고정이상%수궤변량
least squares collocation%height fitting%height anomaly%random variable
经典的平差函数模型中只含有无先验统计信息的非随机参数,而针对附有随机参数的平差问题具有很大的局限性。为此,在 GPS 高程拟合中,用最小二乘配置模型解决了这一问题,并且通过实际算例,设计两种最小二乘配置拟合方案与二次曲面拟合法进行了比较。结果表明,最小二乘配置拟合残差较小,外符合精度较高,高程拟合效果更好。
經典的平差函數模型中隻含有無先驗統計信息的非隨機參數,而針對附有隨機參數的平差問題具有很大的跼限性。為此,在 GPS 高程擬閤中,用最小二乘配置模型解決瞭這一問題,併且通過實際算例,設計兩種最小二乘配置擬閤方案與二次麯麵擬閤法進行瞭比較。結果錶明,最小二乘配置擬閤殘差較小,外符閤精度較高,高程擬閤效果更好。
경전적평차함수모형중지함유무선험통계신식적비수궤삼수,이침대부유수궤삼수적평차문제구유흔대적국한성。위차,재 GPS 고정의합중,용최소이승배치모형해결료저일문제,병차통과실제산례,설계량충최소이승배치의합방안여이차곡면의합법진행료비교。결과표명,최소이승배치의합잔차교소,외부합정도교고,고정의합효과경호。
Classical adjustment function only contains nonrandom parameters,it has great limitations to adjustment problem with stochastic parameters.Therefore in GPS elevation fitting,this paper applied least-square collocation model to solve the problem,and compared the least squares fitting configuration in two schemes with those of the quadric surface fitting method.The results show that the least squares collocation fitting residual error is small,the precision is high and elevation fitting effect is better.