| GPS铁路航测外控点的高程计算模型 |
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| 引用本文： | 沈云中,周全基.GPS铁路航测外控点的高程计算模型[J].同济大学学报(自然科学版),1996,24(4):450-455. |
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| 作者姓名： | 沈云中 周全基 |
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| 作者单位： | 同济大学测量系，铁道部第三勘测设计院 |
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| 基金项目： | 铁道部第三勘测设计院资助 |
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| 摘 要： | 首先从理论上说明ＧＰＳ点高程计算模型中拟合参数的物理意义，并论证一般计算模型所能达到的精度，然后提出铁路测量中ＧＰＳ点的高程计算模型，对试验结果进行分析．理论分析和试验结果充分说明，利用铁路初测水准测量成果进行拟合，所求定的ＧＰＳ点高程精度完全可以满足１∶２０００或更小比例尺成图对航测外控点高程的要求，从而大幅度节省外业工作量．
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| 关 键 词： | 铁路 航空测量 高程 计算 |
GPS Normal Height Calculation Model of Railway Aerial Picture Control Points |
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| Shen Yunzhong,Liu Dajie,Zhou Quanji,Li Wenquan.GPS Normal Height Calculation Model of Railway Aerial Picture Control Points[J].Journal of Tongji University(Natural Science),1996,24(4):450-455. |
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| Authors: | Shen Yunzhong Liu Dajie Zhou Quanji Li Wenquan |
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| Abstract: | In this paper the physical meaning of the fitting parameters in GPS normal height calculation model is first theoretically explained, and the precision reached by the common calculation model is demonstrated. Then the normal height calculation model of GPS points in railway aerophotogrammotric survey is put forward and its test results are analysed. The theoretical analysis and test results fully show that the precision of the GPS normal height obtained through the intorpolation from the results of railway base levelling can meet the requirement of aerophotogrammetric map with the scale less than 1: 2000.Therefore, the field work can ho greatly saved. |
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| Keywords: | GPS positioning Railway aerial photogrammotry Normal height calculation |
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