共查询到20条相似文献，搜索用时 46 毫秒
1.
A-10����������Ұ��������ȷ��� 总被引：2，自引：0，他引：2
????????????????????(g)??A-10????????????и?????????????????????????????????????ó????????????????￡?A-10?????????????????????????????????????????????FG5???????????????????????????????????????????????????????????????????????? 相似文献
2.
介绍了2013~2014年使用A10/028和FG5/214两台绝对重力仪在国家现代测绘基准体系基础设施建设一期工程中绝对重力观测的情况,并对观测结果进行分析。结果显示,两台绝对重力仪观测结果精度及较差都在5 μGal以内,满足高精度重力基准建设的技术要求;A10/028具有一定的野外观测适应性,FG5/214对重力细微变化信号的捕获具有优势,两台绝对重力仪同期观测对于提高观测结果的可靠性和准确度具有积极的作用。 相似文献
3.
Gravity measurement is of great importance to the height datum in Antarctica.The absolute gravity measurement was carried out at Great Wall Station, Antarctica, using FG5 absolute gravity instrument.The gravity data was processed with corrections of earth tide, ocean tide, polar motion and the atmospher, and the RMS is within +3 x 10 -s ms-2.The vertical and horizontal gravity gradients were measured using 2 LaCoaste & Romberg (LCR) gravimeters.The absolute gravity measurement provides the fundamental data for the validation and calibration of the satellite gravity projects such as CHAMP, GRACE and GOCE, and for the high accuracy geoid model. 相似文献
4.
�ɶ���̨������������������ 总被引：16，自引：7，他引：9
2007??4???2008??6?￡???FG5/232??FG5/214????????????????????????????????????????5?ξ???????????????ι????????????С???2??10 -8 ms -2??????t??????????????????????С???????????????????????????????????????2007??12????????????2007??4??????5??10 -8 ms -2?????????????????????仯?????????????????????????????δ????? 相似文献
5.
ŷ��Walferdange���������DZȶԹ۲� 总被引：6，自引：3，他引：3
????2007??11????????Walferdange???????ξ????????????????????????????????????????????20???????????μ?????????ECGS??15??????????????????С??2.1??10 -8 ms -2?? 相似文献
6.
Atsuki Shinbori Tomoaki Hori Yoshimasa Tanaka Yukinobu Koyama Takashi Kikuchi Tsutomu Nagatsuma 《极地研究(英文版)》2013,(4):296-314
To investigate temporal and spatial evolution of global geomagnetic field variations from high-latitude to the equator during geomagnetic storms, we analyzed ground geomagnetic field disturbances from high latitudes to the magnetic equator. The daytime ionospheric equivalent current during the storm main phase showed that twin-vortex ionospheric currents driven by the Region 1 field-aligned currents （R1 FACs） are intensified significantly and expand to the low-latitude region of-30~ magnetic latitude. Centers of the currents were located around 70~ and 65~ in the morning and afternoon, respectively. Corresponding to intensification of the R1 FACs, an enhancement of the eastward/westward equatorial electrojet occurred at the daytime/nighttime dip equator. This signature suggests that the enhanced convection electric field penetrates to both the daytime and nighttime equa- tor. During the recovery phase, the daytime equivalent current showed that two new pairs of twin vortices, which are different from two-cell ionospheric currents driven by the R1 FACs, appear in the polar cap and mid latitude. The former led to enhanced north- ward Bz （NBZ） FACs driven by lobe reconnection tailward of the cusps, owing to the northward interplanetary magnetic field （IMF）. The latter was generated by enhanced Region 2 field-aligned currents （R2 FACs）. Associated with these magnetic field variations in the mid-latitudes and polar cap, the equatorial magnetic field variation showed a strongly negative signature, produced by the westward equatorial electrojet current caused by the dusk-to-dawn electric field. 相似文献
7.
?????ò???????????????????????????￡????????FG5?????????????????????????????????????????????????????????????????????????13?Σ??С?1?飬???????????100?Σ????????5??10 -8 ms -2???????????????????? 相似文献
8.
�й��������������������۲������� 总被引：5，自引：3，他引：2
??????й????????????????????????????FG5/232????????????2007??3??6?????й??????????12?????????????????????????????????????????3????????????????????????????????????2??10 -8 ms -2?? 相似文献
9.
2000国家重力基本网部分站的最新绝对重力测量 总被引：3，自引：0，他引：3
为分析部分2000国家重力基本网点的长期稳定性,应用FG5/240绝对重力仪在该网的永兴岛和郑州站进行了绝对测量。对观测结果的处理表明,观测精度优于5×10 -8 ms -2 ;同时对观测值及其对应的2000国家重力基本网点的重力值进行了比较,得出两者之间重力值差异变化。 相似文献
10.
选取滇西重力测网1986～2009年流动重力观测资料及下关、丽江、昆明3个绝对重力基准点多年复测资料作基准控制,采用线性速率模型拟合观测过程中重力场的时变信息,建立绝对重力基准点约束下的动态平差模型,讨论段差观测值及绝对重力基准观测值协方差矩阵的构建、平差模型初值选取及迭代计算等细节问题。经分析,测区内测点的重力年变率范围为(-0.039 5~0.024 1)×10-5ms-2/a,精度范围为(0.001~0.029 8) ×105ms-2/a,与分期静态平差拟合结果的差异约为(0.003~0.020)×10-5ms-2/a。在处理全国网和较大面积的区域网多年重复观测的重力资料时,尤其是多网多期重力资料联合处理时,应采用动态平差模型来获得统一时间基准和空间基准的重力变化。 相似文献
11.
????2011??????Walfdange????????????????????ECAG??2011?????FG5/232???????????????????????????FG5/232?????????????????????2.5??10
-8 ms -2???????????????н????????? 相似文献
12.
A10/028��FG5���������DZȶԲ������� 总被引：3，自引：0，他引：3
????A10/028??FG5?????????????α?????????????????????????????????????????????A10/028??FG5????????????????????±5×10-8 ms-2????????????????A10/028???????????????????????????????????????????±(2~3)×10-8 ms-2?? 相似文献
13.
���þ��������������ܲⶨ���������ǵĸ�ֵ���� 总被引：6，自引：4，他引：2
???t??????????FG5???????????AG????????????????????????????SG?????????????????????????????????????SG???????????????-76.960??0.085??10 -8 ms -2/V????????0.1%??????????????????????????????????????????????????0.2%?? 相似文献
14.
?????????????????????????????????????????????????о??У?????????????????в?????????????п??????????????????????????????????????????????????????????????????????FG5??????????????????(1.3332??10 -3~1.3332??
10 -4 Pa)?????????????μ?????Щ??????????顣 相似文献
15.
???FG5????????????й?????????????????12?????????????????????????????????????????????????5??10 -8 ms -2??????????????峱????????????????????FG5??????????????Ms6.0??????????? 相似文献
16.
???????????????????????????????????????????????????80 cm??130 cm??????????????????????仯??????0.02×10-8 ms-2/cm??????????仯????仯??????????????????????FG5??A10???????????????????????????????????????????????????仯???????? 相似文献
17.
�й����������ǵڶ��αȶԲ��� 总被引：3，自引：0，他引：3
??????????(CMONOC)?????????μ???????????????????????????????????????б???????????????????????????????????????????????????????????????????ο??????2013-06??????λ??????????????人4????????????????б??????????,??????????????????±2×10-8ms-2?????????CMONOC????????????????? 相似文献
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19.
���ھ�������ʵ��۲�ȶ� 总被引：2，自引：0，他引：2
???FG5???????????????????????2008??1?????й??????????о?????3053????????????????????????о?????????????????FG5-214??FG5-232???н???????????????????????????????????????н????????????????????????????????????2~3????10 -8 ms -2?? 相似文献
20.
�ŷ嶯����ز�������ʵ��վ������������ 总被引：6，自引：2，他引：4
??10???????FG5-112?????????????й???????????????????о?????嶯??????????????????????68??????????ι????????????С??2??10 -8 ms -2???????????????????????С?????????????;????????????????????????????????????仯?????1??10 -8 ms -2 /a??????????λ???????-0.38 cm/a;??????????λ?仯?????????????????????????????? 相似文献