摘要
随着CGCS2000坐标系在我国测绘地理信息行业的全面应用,各地市陆续构建了高精度GNSS网,并建立了更高精度的区域似大地水准面模型。以华南沿海区域GNSS-B级框架网为例,利用GAMIT/GLOBK分析了10 s、15 s、20 s、25 s和30 s的历元间隔对基线解算成果以及平差计算结果精度的影响。结果表明,历元间隔越小,随着观测量的增加,基线解算精度能达到cm级的提高,平差精度能达到mm级的提高;总体平差结果坐标值较差为亚mm级,因此考虑到后续区域似大地水准面模型的精化计算,宜采用较小的历元间隔。
With the comprehensive application of CGCS2000 coordinate system in Chinese surveying and mapping geographical information industry,cities have successively established high accuracy GNSS networks and more accurate regional quasigeoid model.Taking GNSS-B framework network in south China coastal area for example,we used GAMIT/GLOBK to analyze the influence of different epoch intervals in 10 s,15 s,20 s,25 s and 30 s on the accuracy of baseline solution and adjustment calculation results.The test results show that the smaller the interval is,the more accurate the baseline solution will be with the increase of the observation amount,and the adjustment accuracy will be with the improvement of millimeter level.And the overall adjustment result is submillimeter level.Considering the precision calculation of the subsequent regional quasigeoid model,it is advisable to use the smaller interval.
出处
《地理空间信息》
2021年第5期34-37,I0005,共5页
Geospatial Information
基金
广东省自然资源科技计划资助项目(GDZRZYKJ2020006)。
