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| IMPROVED STANDARDIZATION METHOD BASED ON CONCAVE-CONVEX FEATURES OF GPS ORBITS |
| Zhao Ziqiang ;and Liu Zhiping |
| NASG Key Laboratory of Land Environment and Disaster Monitoring，CUMT，Xuzhou 221116 |
| Received: 1900-01-01 Revised: 1900-01-01 Online: null |
Supporting info
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