DocumentCode :
3113850
Title :
An improved inverse distance weighted interpolation method for InSAR tropospheric delay error corrections
Author :
Luo, Haibin ; He, Xiufeng
Author_Institution :
Sch. of Remote Sensing, Nanjing Univ. of Inf. Sci. & Technol., Nanjing, China
fYear :
2011
fDate :
26-28 March 2011
Firstpage :
480
Lastpage :
482
Abstract :
InSAR observation accuracy is greatly affected by the tropospheric delay error. The algorithm using GPS-derived tropospheric delay to correct InSAR tropospheric delay error is an effective method. The GPS-derived tropospheric delays have to be interpolated in order to correct the InSAR result on a pixel-by-pixel basis. For the conventional inverse distance weighted interpolation (IDW), the effect of height on tropospheric delay has not been fully considered. Therefore, an impact factor is designed for the IDW, this is called as improved IDW (IIDW). The experimental results from 22 GPS stations over SCIGN show that, compared with the IDW method, the IIDW method can improve the absolute mean error and standard deviation by 25% and 55%, respectively.
Keywords :
atmospheric electromagnetic wave propagation; geophysical signal processing; radar interferometry; radiowave propagation; remote sensing by radar; synthetic aperture radar; troposphere; GPS derived tropospheric delay; IIDW; InSAR observation accuracy; impact factor; improved IDW; inverse distance weighted interpolation method; tropospheric delay error corrections; Atmospheric measurements; Atmospheric modeling; Delay; Global Positioning System; Helium; Interpolation; Monitoring;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Science and Technology (ICIST), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-9440-8
Type :
conf
DOI :
10.1109/ICIST.2011.5765295
Filename :
5765295
Link To Document :
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