小数偏差产品质量评估及固定性能分析

为了评估不同小数偏差产品的数据质量和模糊度固定效果，比较了2016年全年的SGG FCB产品和CNES产品，结果表明两种产品具有很高的一致性，SGG FCB产品的数据完整性更好。应用两种产品进行精密单点定位(PPP)固定解的静态结果平面位置精度可以达到1 cm以内，高程位置精度可以达到1~2 cm，采用两种产品获得的PPP模糊度固定率十分接近，动态模式下处理静态数据的位置结果可以达到平面2~3 cm，高程5 cm以内的精度，两组固定解的位置误差结果差异不超过5 mm，模糊度固定成功率分别为92.37%和92.14%，两种小数偏差产品在23分钟左右完成首次固定，能够有效提高PPP的收敛速度。使用两种小数偏差产品得到的机载动态数据结果也非常相近。

Quality Evaluation of Fractional Bias Products and Analysis of Integer Ambiguity Resolution

Two kinds of fractional bias products for precise point positioning (PPP) integer ambiguity fixing are compared in order to evaluate the data quality and ambiguity-fixed effects with different fractional bias products. The results show that the two products have a high degree of mutual compliance and the SGG FCB product is more complete. The horizontal averaged position RMS of the static ambiguity-fixed PPP can reach within 1 cm in the plane and the precision of elevation can reach 1~2 cm. The fixed rate of the ambiguity is very closed in different session lengths for using the different products. When dealing with the static data in the dynamical mode, the position results can reach the precision of the plane 2~3 cm and the elevation accuracy within 5 cm. The difference of the two products’ positioning results is no more than 5 mm. And the ambiguity fixing success rates are 92.37%, and 92.14%, respectively in one hour. The two fractional deviation products are fixed for the first time in about 23 minutes, which can effectively improve the convergence time of PPP. The airborne dynamic data results are basically the same with the static data.