Title :
Validation of remotely sensed evapotranspiration: a case study
Author :
Jia, Zhenzhen ; Liu, Shaomin ; Xu, Ziwei
Author_Institution :
State Key Lab. of Remote Sensing Sci., Beijing Normal Univ., Beijing, China
Abstract :
A comprehensive validation method of remotely sensed evapotranspiration (ET) was proposed in this paper. Among this method, an observation system was constituted of an eddy covariance system, a large aperture scintillometer and an automatic weather station, and then an observation network was established at Miyun, Guantao, Daxing, Xiaotangshan, and Haidian Park sites in Hai River Basin, which were set up from 2004 for ET and correlative parameters measurements at different satellite pixel scales. On this basis, rigorous data process and quality control were executed to ensure the high quality of observations. Meanwhile, a validation procedure of remotely sensed ET based on ground measurements was presented, and the method of selecting validation pixels and evaluation index were investigated intensively. According to this method, validation of remote sensing ET was performed in Beijing area. The results demonstrated the proposed validation method was feasible.
Keywords :
geophysical techniques; quality control; remote sensing; rivers; Beijing area; China; Daxing site; Guantao site; Hai River Basin; Haidian Park site; Miyun site; Xiaotangshan site; automatic weather station; correlative parameters; eddy covariance system; evaluation index; evapotranspiration; large aperture scintillometer; pixel scale; quality control; remote sensing; satellite pixel scales; validation pixels; Accuracy; Area measurement; Estimation; Measurement uncertainty; Pixel; Remote sensing; Satellites; Evapotranspiration; pixel scale; validation;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-9565-8
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2010.5653700