GT-1M海洋重力仪与KSS31M海洋重力仪的对比
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摘要
为了检验俄罗斯、加拿大合作生产的GT-1M海洋重力仪与德国KSS31M海洋重力仪的工作性能,验证GT-1M重力数据的可靠性,将GT-1M采集的3条重力剖面与KSS31M重力仪采集的重力测网进行了对比分析。结果显示:GT01剖面与26条KSS31M重力测线的交点差均值为0.31mGal,交点差均方根为2.51mGal;GT02剖面与11条KSS31M重力测线的,交点差均值为–0.78mGal,交点差均方根为1.97mGal;全部交点差均值为–0.01mGal,均方根(RMS)为2.32mGal。GT01剖面与KSS31M测网网格化切割的剖面的变化趋势一致,重力变化幅值基本吻合,相关系数为0.98;而GT02剖面位于KSS31测网边缘,网格化切割的KSS重力剖面不能反应真实的重力场,虽然GT02剖面变化趋势一致,但相关系数仅为0.94,在相位上也明显有误差。考虑到测网位于海底地形崎岖的深水区,而且两次测量时间间隔达3a,因此GT-1M重力仪测试的结果还是基本与KSS31M重力仪吻合的,数据是可靠的。该分析结果对今后的重力测量工作有参考价值。
Three gravity profile data acquired by GT-1M marine gravitymeter produced in Russia and Canada and by KSS31 M marine gravitymeter produced in Germany were compared. The mean value of intersection difference between GT01 profile and 26 KSS31 M gravity survey lines was 0.31 m Gal. The RMS of intersection difference was 2.51 m Gal. The mean value of intersection difference between GT02 profile and eleven KSS31 M gravity survey lines was –0.78 m Gal. The RMS of intersection difference was 1.97 m Gal. The mean value of all intersection dif-ference was –0.01 m Gal and the RMS was 2.32 m Gal. The GT01 profile had the same variation trend with the profile sliced from the gridded survey network of KSS31 M. The variation of gravity amplitude was basically consistent, and the correlation coefficient was 0.98. The GT02 profile was at the edge of the survey network of KSS31 M, so the sliced profile from the gridded measuring network of KSS31 could not reflect the real gravity field. Although they had the consistent trend, the correlation coefficient was 0.94, and they had obvious error in phase. In consideration that the measuring network was located in the deep sea with rugged terrain and the measurement intervals were up to 3 years, the test result of GT gravimeter was basically consistent with that of the KSS31 M gravimeter and the data are reliable.
Three gravity profile data acquired by GT-1M marine gravitymeter produced in Russia and Canada and by KSS31 M marine gravitymeter produced in Germany were compared. The mean value of intersection difference between GT01 profile and 26 KSS31 M gravity survey lines was 0.31 m Gal. The RMS of intersection difference was 2.51 m Gal. The mean value of intersection difference between GT02 profile and eleven KSS31 M gravity survey lines was –0.78 m Gal. The RMS of intersection difference was 1.97 m Gal. The mean value of all intersection dif-ference was –0.01 m Gal and the RMS was 2.32 m Gal. The GT01 profile had the same variation trend with the profile sliced from the gridded survey network of KSS31 M. The variation of gravity amplitude was basically consistent, and the correlation coefficient was 0.98. The GT02 profile was at the edge of the survey network of KSS31 M, so the sliced profile from the gridded measuring network of KSS31 could not reflect the real gravity field. Although they had the consistent trend, the correlation coefficient was 0.94, and they had obvious error in phase. In consideration that the measuring network was located in the deep sea with rugged terrain and the measurement intervals were up to 3 years, the test result of GT gravimeter was basically consistent with that of the KSS31 M gravimeter and the data are reliable.
引文
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[10]王秀东,王真,王先超,等.KSS31M型海洋重力仪阻尼延迟时间修正后对重力测网精度的影响[J].海洋通报,2010,29(3):320-323.
[11]符溪.KSS31重力仪与Hipack导航系统接口应用程序开发[J].物探装备,2004,14(2):126-129.
[12]张遴梁.海洋重力仪的现状和发展[J].海洋科学,2001,25(9):18-20.
[13]欧阳永忠,孙毅,黄谟涛,等.S-II型海洋重力仪的特点及使用问题[J].海洋测绘,2006,26(3):75-78.
[14]张涛,高金耀,陈美.利用相关分析法对S型海洋重力仪数据进行分析与改正[J].海洋测绘,2007,27(2):1-5.
[15]王福民,叶宇星.S-II型海洋重力仪介绍和使用方法[J].物探装备,2007,17(3):210-214.
[2]Berzhitsky V N,Bolotin Y V,Golovan A A,et al.GT-1A inertial gravimeter system:Results of Flight Tests[M].Lomonosov Moscow State University.Russia,Moscow:Lomonosov Moscow State University,2002:3-40.
[3]Gabell A,Tuckett H,Olson D.The GT-1A mobile gravimeter[C].Richard L.ASEG-PESA Airborne Gravity2004 Workshop:Geoscience Australia Record.Australia:Spatial Information for the Nation,2004:55-63.
[4]孙中苗,翟振和,李迎春.航空重力仪发展现状和趋势[J].地球物理学进展,2013,28(1):1-8.
[5]陈邦彦,梁广胜.海洋重力测量和KSS31型重力仪[J].海洋地质,1998,3:8-20.
[6]陈邦彦,梁广胜.海洋重力测量和KSS31型重力仪[J].海洋地质,1999,1:1-16.
[7]顾兆峰,张志珣,杨慧良,等.KSS 31M海洋重力仪静态观测结果及分析[J].海洋测绘,2005,25(2):66-68.
[8]付永涛,王先超,谢天峰.KSS31M型海洋重力仪在海边静态观测的结果——兼与栾锡武先生商榷[J].地球物理学进展,2007,22(1):308-311.
[9]付永涛,王先超,谢天峰.KSS31M型海洋重力仪动态性能的分析[J].海洋科学,2007,31(6):29-33.
[10]王秀东,王真,王先超,等.KSS31M型海洋重力仪阻尼延迟时间修正后对重力测网精度的影响[J].海洋通报,2010,29(3):320-323.
[11]符溪.KSS31重力仪与Hipack导航系统接口应用程序开发[J].物探装备,2004,14(2):126-129.
[12]张遴梁.海洋重力仪的现状和发展[J].海洋科学,2001,25(9):18-20.
[13]欧阳永忠,孙毅,黄谟涛,等.S-II型海洋重力仪的特点及使用问题[J].海洋测绘,2006,26(3):75-78.
[14]张涛,高金耀,陈美.利用相关分析法对S型海洋重力仪数据进行分析与改正[J].海洋测绘,2007,27(2):1-5.
[15]王福民,叶宇星.S-II型海洋重力仪介绍和使用方法[J].物探装备,2007,17(3):210-214.