Evaluation of vegetation indices based on microwave data by simulation and measurements

Author

Li, Yunqing ; Zhang, Lixin ; Jiang, Lingmei ; Zhang, Zhongjun ; Zhao, Tianjie

Author_Institution

State Key Lab. of Remote Sensing Sci., Beijing Normal Univ., Beijing, China

fYear

2010

fDate

25-30 July 2010

Firstpage

3311

Lastpage

3314

Abstract

As an indicator of vegetation, vegetation index, such as Microwave Polarization Difference Temperatures (MPDT), Microwave Polarization Difference Index (MPDI) and Microwave Vegetation Indices (MVIs), is widely used in vegetation water content (VWC) and soil moisture retrieval. In this essay, Ferrazzoli´s radiative transfer model was utilized for simulation, and a truck-mounted Microwave Radiometer (BNU-TMMR) for experiments. Subsequently, there comes a comparison and evaluation of the three vegetation indices´ sensitivity to soil moisture and VWC which were proposed by both utilizing model simulation and field measurements. MPDT and MPDI increase with soil moisture rising up, and are more sensitive to lower soil moisture, while the trend of MVIs_B is smooth. In term of VWC influence, MVIs_B has higher sensitivity to lower VWC vegetation, and they are all negatively correlated to VWC.

Keywords

hydrology; microwave measurement; radiative transfer; soil; vegetation; vegetation mapping; BNU-TMMR; Ferrazzoli radiative transfer model; MPDI; MPDT; MVI; microwave measurement; microwave polarization difference index; microwave polarization difference temperatures; microwave vegetation indices; soil moisture retrieval; truck-mounted microwave radiometer; vegetation index; vegetation water content; Microwave radiometry; Microwave theory and techniques; Soil measurements; Soil moisture; Vegetation; Vegetation mapping; Vegetation Indices; radiative transfer model; track-monted microwave radiometer experiments;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International

Conference_Location

Honolulu, HI

ISSN

2153-6996

Print_ISBN

978-1-4244-9565-8

Electronic_ISBN

2153-6996

Type

conf

DOI

10.1109/IGARSS.2010.5649579

Filename

5649579