摘要
运用山基GPS掩星探测技术对2005年8月河北雾灵山山基GPS掩星观测试验数据进行了处理,获得了接收机高度以下的大气折射率廓线;分析了掩星反演结果的内部符合情况,并利用同时进行的联合探空观测数据,将探空结果与掩星反演结果进行了比对分析。分析结果表明,山基GPS掩星反演大气折射率的内部符合精度优于1%,与常规探空结果的平均偏差为5.9%。反演结果偏小,标准偏差为5.6%。
Mountain-based GPS occultation experiment was performed on the top of Mt. Wuling near Beijing city from Aug. 1 to 29,2005 for the purpose of the test of refractivity retrieval technique. During the experiment, the radiosonde observation was taken at Xinglong County, SES the Mt. Wuling about 30 km. The state of arts of the mountain-based GPS occultation sounding at home and abroad are described, the inversion algorithm for mountain-based occultation is also discussed. The refractivity profiles below the mountain height are obtained by using Abel inversion method. The comparisons of the refractivity obtained from different GPS receivers are made. The differences between occultation refractivity and radiosonde data are obtained. Based on these analyses, we find that the interior accuracy of the retrieval results is better than 1%; the average deviation from the radiosonde data is 5.9%, the RMS is 5%.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2008年第1期89-92,共4页
Geomatics and Information Science of Wuhan University
基金
中国气象局新技术推广资助项目
关键词
GPS
山基掩星观测
反演
大气折射率
误差分析
GPS
mountain-based occultation measurement
inversion
atmospheric refractivity
error analysis
