利用精密单点定位（PPP）方法在黑龙江省进行1∶10000像片控制测量的精度分析

摘要

通过对黑龙江省某测区利用GPS静态网和精密单点定位（ PPP）两种方法对1∶10000像片控制测量成果进行对比分析，在利用CQG2000对大地高进行高程异常改算精度同传统GPS网拟合高程进行对比分析。通过对比分析得出结论：精密单点定位（ PPP）方法施测的像控点平面精度能够满足1∶10000地形图更新、山区1∶10000地形图测绘中±1m 的精度要求。同时也验证了“我国大陆重力大地水准面CQG2000绝对精度在东经120°以东高于±0．3 m的可靠性。%Abstar ct:Based on the comparison and analysis between the1∶10 000 photo control survey results by using the of method of static GPS network and the Precise Point Positioning ( PPP) method in certain area of Heilongjiang Province, and the analysis on the height with the height abnormal calculation to geodetic height using CQG2000 and the height derived from fitting height by traditional GPS, this paper drew the conclusion:the plane precision of the surveyed ground control points by Precise Point Positioning( PPP) method can satisfy the accuracy requirements with ±1 m of 1∶10 000 topographic map updating in the flat area and 1∶10 000 topographic map surveying in the mountain area. Meanwhile, it also verified the reliability of the absolute accuracy of China Mainland gravimetric ge-oids CQG2000 is better than ±0.3m in longitude 120°of east.