A time-series method for spatial disaggregation of radiometer brightness temperature using higher resolution radar observations

Author

Liu, Chenzhou ; Shi, Jiancheng ; Zhang, Shenglei ; Gao, Shuai

Author_Institution

Inst. of Remote Sensing Applic., Beijing, China

fYear

2012

fDate

22-27 July 2012

Firstpage

734

Lastpage

737

Abstract

Based on linear relationship between L band brightness temperature and L band backscattering coefficient, a time-series method is proposed to disaggregate brightness temperature at coarse resolution. The algorithm was validated with both in situ PALS dataset from SMEX02 and simulated dataset based on PALS observation. It was found that accuracy of brightness temperature for V polarization (RMSE equal 5.2K) is better than for H polarization (RMSE equal 10.03K). The results reveal a potential possibility that the disaggregated brightness temperature could be used for soil moisture retrieval.

Keywords

atmospheric radiation; atmospheric techniques; remote sensing by radar; soil; H polarization; L band backscattering coefficient; L band brightness temperature; PALS observation; SMEX02 field campaign; V polarization; higher resolution radar observations; in situ PALS dataset; radiometer brightness temperature; soil moisture retrieval; time-series method; Backscatter; Brightness temperature; Equations; Mathematical model; Microwave radiometry; Radar; Soil moisture; PALS; backscattering coefficient; brightness temperature; disaggregation;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International

Conference_Location

Munich

ISSN

2153-6996

Print_ISBN

978-1-4673-1160-1

Electronic_ISBN

2153-6996

Type

conf

DOI

10.1109/IGARSS.2012.6351460

Filename

6351460