关于平均海面精度指标的探讨
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摘要
考证了"平均海面转测误差不得大于10cm"的由来,分析了提出该精度指标的历史背景及其合理性。在此基础上,建议在目前的客观条件下,应以10cm作为95%置信度的误差指标。针对现行海道测量规范中关于计算平均海面的条目,提出了两点修改意见:一是删除长期站时长要求的条目;二是对于短期站与临时站,强制实施传递技术与精度评估。
Mean sea level( MSL) of short term tidal stations should be calculated by MSL transfer technique,whose root-mean-error should not exceed 10 cm. The 10 cm accuracy indicator is an exclusive error limit for computation of MSL. Its origin,history and feasibility are analyzed. Because of significant advances in water level measurement and increasing long-term tidal stations,the 10 cm computation error of MSL at the 95%confidence level is more appropriate than 10 cm root-mean-error. Then terms about computation of MSL in specifications for hydrographic survey are discussed. And two recommendations to revise the specifications are given.The first one is to delete terms about long term stations.The second one is technique transfer and accuracy evaluation should be applied for MSL computation of short term station.
Mean sea level( MSL) of short term tidal stations should be calculated by MSL transfer technique,whose root-mean-error should not exceed 10 cm. The 10 cm accuracy indicator is an exclusive error limit for computation of MSL. Its origin,history and feasibility are analyzed. Because of significant advances in water level measurement and increasing long-term tidal stations,the 10 cm computation error of MSL at the 95%confidence level is more appropriate than 10 cm root-mean-error. Then terms about computation of MSL in specifications for hydrographic survey are discussed. And two recommendations to revise the specifications are given.The first one is to delete terms about long term stations.The second one is technique transfer and accuracy evaluation should be applied for MSL computation of short term station.
引文
[1]GB 12327-1998.海道测量规范[S].北京:中国标准出版社,1999.
[2]王志豪.应用潮汐文集第二集——中国的海平面与基准面[M].天津,1986.
[3]文援兰,熊介,杨元喜.几种平均海面模型的数字实现与比较[J].解放军测绘学院学报,1994,11(3):167-170.
[4]暴景阳,章传银.关于海洋垂直基准的讨论[J].测绘通报,2001(6):10-11.
[5]方国洪,魏泽勋,方越,等.依据海洋环流模式和大地水准测量获取的中国近海平均海面高度分布[J].科学通报,2001,46(18):1572-1575.
[6]邓凯亮,暴景阳,章传银,等.联合多代卫星测高数据确定中国近海稳态海面地形模型[J].测绘学报,2009,38(2):114-119.
[7]许军,暴景阳,于彩霞.平均海面传递方法的比较与选择[J].海洋测绘,2014,34(1):5-7.
[8]许军,暴景阳,刘雁春,等.平均海面同步改正传递法的误差分析[J].海洋测绘,2012,32(4):22-24.
[9]段福楼.关于同步改正法求得短期验潮站平均海面所需同步天数的探讨[J].海洋测绘,1997(4):23-28.
[10]田光耀.关于同步观测长度的探讨[J].海洋测绘,1999,19(1):35-38.
[11]刘雁春.海道测量基准面传递的数学模型[J].测绘学报,2000,29(4):310-316.
[12]黄辰虎,黄谟涛,刘雁春,等.海道测量长期平均海面传递的异步效应计算与分析[J].海洋科学进展,2008,26(1):51-56.
[2]王志豪.应用潮汐文集第二集——中国的海平面与基准面[M].天津,1986.
[3]文援兰,熊介,杨元喜.几种平均海面模型的数字实现与比较[J].解放军测绘学院学报,1994,11(3):167-170.
[4]暴景阳,章传银.关于海洋垂直基准的讨论[J].测绘通报,2001(6):10-11.
[5]方国洪,魏泽勋,方越,等.依据海洋环流模式和大地水准测量获取的中国近海平均海面高度分布[J].科学通报,2001,46(18):1572-1575.
[6]邓凯亮,暴景阳,章传银,等.联合多代卫星测高数据确定中国近海稳态海面地形模型[J].测绘学报,2009,38(2):114-119.
[7]许军,暴景阳,于彩霞.平均海面传递方法的比较与选择[J].海洋测绘,2014,34(1):5-7.
[8]许军,暴景阳,刘雁春,等.平均海面同步改正传递法的误差分析[J].海洋测绘,2012,32(4):22-24.
[9]段福楼.关于同步改正法求得短期验潮站平均海面所需同步天数的探讨[J].海洋测绘,1997(4):23-28.
[10]田光耀.关于同步观测长度的探讨[J].海洋测绘,1999,19(1):35-38.
[11]刘雁春.海道测量基准面传递的数学模型[J].测绘学报,2000,29(4):310-316.
[12]黄辰虎,黄谟涛,刘雁春,等.海道测量长期平均海面传递的异步效应计算与分析[J].海洋科学进展,2008,26(1):51-56.