An Improved Method for Transforming GPS/INS Attitude to National Map Projection Frame

An Improved Method for Transforming GPS/INS Attitude to National Map Projection Frame
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GPS/INS姿态向国家地图投影框架变换的改进方法

DOI:
10.1109/lgrs.2015.2396518
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发表时间:
2015-02
影响因子:
4.8
通讯作者:
Li Qingquan
Li Qingquan
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhang Yongjun;Lu Xiao;Xie Qian;Li Qingquan

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全球定位系统/惯性导航系统(GPS/INS)组合导航系统凭借其直接测量WGS 84基准中高精度位置和姿态数据的能力,在现代摄影测量和激光扫描中发挥着非常重要的作用。在实践中,由于地理配准通常是在国家坐标中进行,因此需要首先将GPS/INS数据转换为所需的国家地图投影框架。本文提出了一种考虑基准尺度畸变和长度畸变的改进的基于坐标变换的 GPS/INS 姿态变换方法。实验结果表明,改进方法的变换误差在1×10-5°的数量级,在航空摄影测量处理中可以安全地忽略,而之前基于坐标变换的方法的最大误差可达几个0.001°。
Global Positioning System/Inertial Navigation System (GPS/INS) integrated navigation systems play a very important role in modern photogrammetry and laser scanning by virtue of their capability of direct measurement of high-precision position and attitude data in the WGS 84 datum. In practice, as georeferencing is often conducted in national coordinates, there is a need to transform GPS/INS data to the required national map projection frame first. This letter presents an improved coordinate-transformation-based method for the GPS/INS attitude transformation by taking the datum scale distortion and the length distortion into account. Experimental results show that the transformation errors of our improved method are on the order of magnitude of 1 × 10-5°, which can be safely ignored in aerial photogrammetric processing, whereas the maximum error of the previous coordinate-transformation-based method can be up to several 0.001°.
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