| 提高GPS高程拟合模型精度的有效方法 |
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| 引用本文： | 王昶,王旭.提高GPS高程拟合模型精度的有效方法[J].测绘与空间地理信息,2013(12):171-174,178. |
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| 作者姓名： | 王昶 王旭 |
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| 作者单位： | [1]辽宁科技大学土木工程学院,辽宁鞍山114051 [2]辽宁林业职业技术学院,辽宁沈阳110100 |
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| 摘 要： | 在调兵山地区，选择76大地高和正常高都已知的点作为原始数据，采用多项式拟合加权平均法建立该地区大地水准面，包括泰勒二次多项式加权平均法和双二次多项式加权平均法。通过实例发现，泰勒二多项式曲面加权平均法和双二次多项式加权平均法对高程异常的短波项有很好的改进效果，拟合残差值比较大的点采用泰勒二次多项式曲面加权平均法和双二次多项式加权平均法残差值变小，大大提高了拟合模型的精度，改善了拟合模型。
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| 关 键 词： | 高程拟合 加权平均法 泰勒二次多项式拟合 双二次多项式拟合 高程异常 |
An Effective Method for Improving the Accuracy of GPS Elevation Fitting Model |
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| WANG Chang,WANG Xu.An Effective Method for Improving the Accuracy of GPS Elevation Fitting Model[J].Geomatics & Spatial Information Technology,2013(12):171-174,178. |
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| Authors: | WANG Chang WANG Xu |
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| Institution: | 1. School of Civil Engineering, University of Science and Technology Liaoning, Anshan 114051, China; 2. Liaoning Forestry Vocational College, Shenyang 110100, China) |
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| Abstract: | In Diaobingshan area, by using 76 point which acquires geodetic height by GPS positioning technology known as the raw da- ta, we create a mathematical geoid model by polynomial fitting weighted average method, including Taylor polynomial weighted average method and double secondary polynomial weighted average method. The result of examples illustrates that this two methods have good improved effect in elevation abnormal shortwave term. The residuals which are relatively large of points become small by the two meth- ods, greatly improve the accuracy of the fitting model and make the fitting model better. |
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| Keywords: | elevation fitting weighted average method Taylor polynomial method double secondary polynomial method height a- nomaly |
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