Development of an Attitude Transformation Method From the Navigation Coordinate System to the Projection Coordinate System
Development of an Attitude Transformation Method From the Navigation Coordinate System to the Projection Coordinate System
复制标题
导航坐标系到投影坐标系姿态变换方法的开发
DOI：
10.1109/lgrs.2019.2944460
复制
发表时间：
2020-08-01
影响因子：
4.8
通讯作者：
Han, Xiaofeng
中科院分区：
文献类型：
--
作者：
Liu, Jianchen;Xu, Wei;Han, Xiaofeng
位置定向系统（POS）获得的位置和姿态信息是利用导航坐标系来定义的，但实际生产应用一般是在地图投影框架下进行的。因此，在实际应用前，有必要将POS数据转换为地图投影框架。考虑到现有算法的复杂性，以及目前广泛使用的地心坐标系，如WGS 84和CGCS 2000，本文提出了一种简化的POS姿态转换方法（ST-方法）。它与目前广泛使用的经典Legat方法有明显的区别。文中的算法可称为一步变换法，它不涉及地心坐标系和局部切平面坐标系。对导航坐标系到投影坐标系的直接转换过程进行了深入的分析，推导了转换公式。与经典方法相比，本文最大的贡献是简化了转换过程，实验结果表明，本文方法在不损失精度的情况下，可以达到与现有方法相同的效果。
The position and attitude information obtained by the position and orientation system (POS) are defined by using the navigation coordinate system, but the actual production application is generally carried out under the map projection frame. Therefore, it is necessary to transform POS data into the map projection frame before it is applied in practice. Considering the complexity of the existing algorithms, and the geocentric coordinate systems that are currently widely used, such as WGS84 and CGCS2000, this letter proposes a simplified transformation method (ST-method) for the POS attitude transformation. It is obviously different from the classical Legat’s method which is widely used at present. The algorithm in this letter can be called one-step transformation method, in which the geocentric coordinate system and the local tangent plane coordinate system are not involved. The conversion process has been deeply analyzed and the conversion formula is deduced, directly from navigation coordinate system to projection coordinate system. Compared with the classical methods, the most important contribution of this letter is to simplify the conversion process, and the experimental results show that the proposed method can achieve the same effect as the existing methods with no loss of accuracy.