| 关于布设GPS大地—水准网的建议 |
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| 引用本文： | 魏子卿.关于布设GPS大地—水准网的建议[J].测绘学报,1992,21(4):310-320,F003. |
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| 作者姓名： | 魏子卿 |
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| 作者单位： | 西安测绘研究所 |
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| 摘 要： |
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| 关 键 词： | 全球定位系统 大地 水准网 测量 |
A PROPOSAL CONCERNING ESTABLISHING A GPSGEODETIC-LEVELLING NETWORK |
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| Wei Ziqing.A PROPOSAL CONCERNING ESTABLISHING A GPSGEODETIC-LEVELLING NETWORK[J].Acta Geodaetica et Cartographica Sinica,1992,21(4):310-320,F003. |
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| Authors: | Wei Ziqing |
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| Institution: | Xi'an Research Institute of Surveying and Mapping |
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| Abstract: | :
It is proposed in the paper that a GPS geodetic-levelling network(GPSGLN) consisting of hundreds of points on a national scale be established to strengthen the astroge-odetic network, control the astrogravimetric levelling network and refine the geoid.
The proposed GPSGLN should be laid out in two tiers, with the primary net measured at a 0.lppm level and the secondary with a Ippm precision. GPS points should be deployed at the junctures of first-order triangulation chains, in the central area of triangulation loops, at the nodal points of first and second order traverses and within traverse loops. Simulation study shows that in the GPSGLN the error in horizontal po sition would be on the average 0.21m and the error in height anomaly 0.21m as well with a 156km resolution. Under the control of the GPSGLN the positional precision for anyv points in the astrogeodetic network would be better than 0.3m, and the precision of height anomaly on the astrogravimetric levelling route might be better than 0.6m. |
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| Keywords: | :GPS Geodetic--levelling network GPS levelling astrogeodetic net-work Astrogravimetric levelling network Height anomaly Geoid |
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