基于抗差估计的实时单站 GPS 同震速度获取方法

摘要

Based on the model of real‐time epoch‐differential coseimic velocity extraction ,the robust least square estimation is introduced and the IGG Ⅲ principle is employed to choose the equivalent weight to lower the effect of the cycle slips and gross errors .The algorithm is tested with static GPS data and the high‐rate GPS data during “March 11th” earthquake in 2011 in Japan .The result shows that robust least square estimation can improve the accuracy greatly and the accuracy magnitude of coseimic velocitys can keep on mm/s after RLS estimation .%基于实时单站GPS载波相位历元差分测速模型，引入抗差最小二乘估计，并根据IGGⅢ方案选择合适的等价权因子来削弱小周跳和粗差对结果的影响，并采用一组静态数据和2011年日本“3畅11”地震期间M IZ U站的高频数据对算法进行测试。结果表明，在含有小周跳和粗差的情况下，抗差最小二乘估计能够明显改善解算速度，可以实时获取测站毫米级的同震速度。