Precision is an important parameter of GPS, and error is an important factor of restriction precision.
精度是GPS的一个重要参数，而误差是制约精度的一个重要因素。
Based on the primary quadric error metric arithmetic, combined with boundary constrained condition and normal restriction, the primary arithmetic is modified and the application scope is extended.
在二次误差度量算法的基础上，考虑边界约束条件和法向量限制，扩展了算法的应用范围。
For the restriction of sense principle, in some special cases, the HMR3000 digital compass module has a great error in roll and pitch outputs.
HMR30 0 0数字罗经模块由于其测量原理的限制，在某些特殊的应用场合，横摇和纵摇输出将可能出现较大的误差。
For the restriction of sense principle, in some special cases, the HMR3000 digital compass module has a great error in roll and pitch outputs.
HMR30 0 0数字罗经模块由于其测量原理的限制，在某些特殊的应用场合，横摇和纵摇输出将可能出现较大的误差。
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