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。
2
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。
3
For the restriction of sense principle, in some special cases, the HMR3000 digital compass module has a great error in roll and pitch outputs.