iGrav-012超导重力仪定期格值结果分析
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摘要
利用绝对重力仪FG5X-249与超导重力仪iGrav-012在中国计量科学研究院昌平院区开展连续同期同址观测,通过最小二乘回归分析法对iGrav-012超导重力仪进行定期格值标定。2014年至2017年间的相关计算结果表明:iGrav-012超导重力仪每年的格值因子精度均优于0. 1%;当绝对重力仪FG5X-249的下落次数超过6 000次时,即可得到稳定的格值因子;格值因子年最大变化量低于0. 6 nm·s~(-2)·V~(-1),每年格值一次即可达到精度要求。iGrav-012超导重力仪可以作为国家重力计量基准仪器的组成部分,为2017年全球绝对重力仪关键比对CCM. G-K2. 2017期间的重力测量结果建立时间链接,比对结束后用于重力测量量值的溯源。
FG5 X-249 absolute gravimeter and iGrav-012 superconducting gravimeter were observed in the same period and site in Changping campus of National Institute of Metrology,China. The calibration factor of iGrav-012 superconducting gravimeter is calculated by the method of least squares regression analysis. The calculation results from observations during the year of 2014 to 2017 showed that the relative calibration factor accuracy of each year is better than 0. 1%. When the drop numbers of FG5 X-249 absolute gravimeter is more than 6 000,the calibration factor can be stable. According to the analysis result the annual maximum variation is less than 0. 6 nm·s-2·V-1,so that calibration once a year can meet the requirements of accuracy. The iGrav-012 can be used as part of national metrologia reference standard of gravity measurement,provide the gravity variation with time link during the international key comparison of absolute gravimeters CCM. G-K2. 2017 and be used for the traceability of absolute gravimeters after comparison.
FG5 X-249 absolute gravimeter and iGrav-012 superconducting gravimeter were observed in the same period and site in Changping campus of National Institute of Metrology,China. The calibration factor of iGrav-012 superconducting gravimeter is calculated by the method of least squares regression analysis. The calculation results from observations during the year of 2014 to 2017 showed that the relative calibration factor accuracy of each year is better than 0. 1%. When the drop numbers of FG5 X-249 absolute gravimeter is more than 6 000,the calibration factor can be stable. According to the analysis result the annual maximum variation is less than 0. 6 nm·s-2·V-1,so that calibration once a year can meet the requirements of accuracy. The iGrav-012 can be used as part of national metrologia reference standard of gravity measurement,provide the gravity variation with time link during the international key comparison of absolute gravimeters CCM. G-K2. 2017 and be used for the traceability of absolute gravimeters after comparison.
引文
[1]吴书清,李春剑,徐进义,等.CCM.G-K2国际比对和NIM-3A型绝对重力仪[J].计量学报,2017,38(1):127-128.Wu S Q,Li C J,Xu J Y,et al.The Comparison of Absolute Gravimeters CCM.G-K2 and NIM-3A Absolute Gravimeter[J].Acta Metrologica Sinica,2017,38(1):127-128.
[2]Francis O,Baumann H,Ullrich C,et al.CCM.G-K2key comparison[J].Metrologia,2015,52(1):22-23.
[3]吴书清,李春剑,粟多武,等.绝对重力仪国际比对新动态[J].计量学报,2013,34(6):545-547.Wu S Q,Li C J,Su D W,et al.The New Development of International Comparison of Absolute Gravimeters[J].Acta Metrologica Sinica,2013,34(6):545-547.
[4]Feng J,Wu S,Su D.Precision evaluation of calibration factor of a superconducting gravimeter using an absolute gravimeter[C]//International Symposium on Precision Mechanical Measurements.2016:99031O.
[5]陈晓东.武汉九峰台超导重力仪固体潮观测资料的预处理和分析结果[D].北京:中国科学院研究生院(测量与地球物理研究所),2003.
[6]孙和平,刘清超,吴书清,等.北京地区最新重力潮汐结果及其在检测液核共振效应中的应用[J].地球物理学报,2017,60(12):4699-4708.Sun H P,Liu Q C,Wu S Q,et al.The latest gravity tide results in Beijing and its application in detecting resonant effect of the fluid outer core[J].Chinese Journal of Geophysics,2017,60(12):4699-4708.
[7]陈晓东,孙和平,张为民,等.用绝对重力仪测定超导重力仪格值的精度分析[J].大地测量与地球动力学,2013,33(5):145-149.Chen X D,Sun H P,Zhang W M,et al.Accuracy Analysis on Determination of Calibration Factor of a Superconducting Gravimeter Using an Absolute Gra Vimeter[J].Journal of Geodesy And Geodynamics,2013,33(5):145-149.
[8]邢乐林,李辉,刘子维,等.利用绝对重力测量精密测定超导重力仪的格值因子[J].大地测量与地球动力学,2010,30(1):48-50.Xing L L,Li H,Liu Z W,et al.Scale Factor Calibration of a Superconducting Gravimeter by usng Absolute Gravimetry[J].Journal of Geodesy and Geodynamics,2010,30(1):48-50.
[9]刘子维,李辉,郝洪涛,等.SG-053超导重力仪的观测结果分析[J].大地测量与地球动力学,2010,30(6):157-160.Liu Z W,Li H,Hao H T,et al.Analysis of Observations Of Superconducting Gravimeter SG-053[J].Journal of Geodesy and Geodynamics,2010,30(6):157-160.
[10]Francis O,Dam T V.Evaluation of the precision of using absolutegravimeters to calibrate superconducting gravimeters[J].Metrologia International Journal of Scientific Metrology,2002,39(5):485-488.
[11]贾剑钢,栾威,申文斌.i Grav-007超导重力仪格值的精密测定[J].武汉大学学报(信息科学版),2015,40(10):1366-1370.Jia J G,Li W,She W B.Accurate Determination of the Calibration Factor of i Grav-007 Superconducting Gravimeter[J].Geomatics and Information Science of Wuhan University,2015,40(10):1366-1370.
[12]Tamura Y,Sato T,Fukuda Y,et al.Scale factor calibration of a superconducting gravimeter at Esashi Station,Japan,using absolute gravity measurements[J].Journal of Geodesy,2004,78(7-8):481-488.
[2]Francis O,Baumann H,Ullrich C,et al.CCM.G-K2key comparison[J].Metrologia,2015,52(1):22-23.
[3]吴书清,李春剑,粟多武,等.绝对重力仪国际比对新动态[J].计量学报,2013,34(6):545-547.Wu S Q,Li C J,Su D W,et al.The New Development of International Comparison of Absolute Gravimeters[J].Acta Metrologica Sinica,2013,34(6):545-547.
[4]Feng J,Wu S,Su D.Precision evaluation of calibration factor of a superconducting gravimeter using an absolute gravimeter[C]//International Symposium on Precision Mechanical Measurements.2016:99031O.
[5]陈晓东.武汉九峰台超导重力仪固体潮观测资料的预处理和分析结果[D].北京:中国科学院研究生院(测量与地球物理研究所),2003.
[6]孙和平,刘清超,吴书清,等.北京地区最新重力潮汐结果及其在检测液核共振效应中的应用[J].地球物理学报,2017,60(12):4699-4708.Sun H P,Liu Q C,Wu S Q,et al.The latest gravity tide results in Beijing and its application in detecting resonant effect of the fluid outer core[J].Chinese Journal of Geophysics,2017,60(12):4699-4708.
[7]陈晓东,孙和平,张为民,等.用绝对重力仪测定超导重力仪格值的精度分析[J].大地测量与地球动力学,2013,33(5):145-149.Chen X D,Sun H P,Zhang W M,et al.Accuracy Analysis on Determination of Calibration Factor of a Superconducting Gravimeter Using an Absolute Gra Vimeter[J].Journal of Geodesy And Geodynamics,2013,33(5):145-149.
[8]邢乐林,李辉,刘子维,等.利用绝对重力测量精密测定超导重力仪的格值因子[J].大地测量与地球动力学,2010,30(1):48-50.Xing L L,Li H,Liu Z W,et al.Scale Factor Calibration of a Superconducting Gravimeter by usng Absolute Gravimetry[J].Journal of Geodesy and Geodynamics,2010,30(1):48-50.
[9]刘子维,李辉,郝洪涛,等.SG-053超导重力仪的观测结果分析[J].大地测量与地球动力学,2010,30(6):157-160.Liu Z W,Li H,Hao H T,et al.Analysis of Observations Of Superconducting Gravimeter SG-053[J].Journal of Geodesy and Geodynamics,2010,30(6):157-160.
[10]Francis O,Dam T V.Evaluation of the precision of using absolutegravimeters to calibrate superconducting gravimeters[J].Metrologia International Journal of Scientific Metrology,2002,39(5):485-488.
[11]贾剑钢,栾威,申文斌.i Grav-007超导重力仪格值的精密测定[J].武汉大学学报(信息科学版),2015,40(10):1366-1370.Jia J G,Li W,She W B.Accurate Determination of the Calibration Factor of i Grav-007 Superconducting Gravimeter[J].Geomatics and Information Science of Wuhan University,2015,40(10):1366-1370.
[12]Tamura Y,Sato T,Fukuda Y,et al.Scale factor calibration of a superconducting gravimeter at Esashi Station,Japan,using absolute gravity measurements[J].Journal of Geodesy,2004,78(7-8):481-488.