Retrieval of wheat chlorophyll by an X-band scatterometer

• Published in: International journal of remote sensing Vol. 24; no. 23; pp. 4939 - 4951
• Main Authors: Singh, D., Yamaguchi, Y., Yamada, H., Singh, K. P.
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis Group 01-01-2003; Taylor and Francis
• Subjects: Agronomy. Soil science and plant productions; Applied geophysics; Biological and medical sciences; Earth sciences; Earth, ocean, space; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Generalities. Biometrics, experimentation. Remote sensing; Internal geophysics; Remote sensing; India; microwaves; chlorophyll; remote sensing; vegetation; Scatterometer; Asia; photosynthesis; regression; polarization; ground methods; Wheat; age; Angle of incidence
• ISSN: 0143-1161; 1366-5901
• DOI: 10.1080/0143006031000095961

This paper presents the experimental results of using a scattering coefficient to retrieve chlorophyll at X-band. The observations were carried out in India, during November 1997 to March 1998, by a ground-based X-band scatterometer. The wheat chlorophyll was obtained at a regular interval of 12 days. The scattering coefficient on wheat chlorophyll was measured as a function of the incidence angle and polarization. The scattering coefficient increased as the chlorophyll (chl) increased in the wheat. Chlorophyll is more sensitive for VV-polarization than HH-polarization. There is a significant relationship between chlorophyll and the polarimetric discrimination ratio (D) at an incidence angle of 40°. Using the obtained results, an empirical model for the scattering coefficient is proposed for accessing the chlorophyll of wheat at X-band.