Monitoring the Paddy Crop Growth through Active Microwave Radar: Possibilities and Difficulties.
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Accession number;99A0764756
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| Title;Monitoring the Paddy Crop Growth through Active Microwave Radar: Possibilities and Difficulties. |
| Author;
ROMSHOO S A
(Univ. Tokyo, Tokyo)
KOIKE M
(Univ. Tokyo, Tokyo)
NAKAEGAWA T
(Univ. Tokyo, Tokyo)
HIRONAKA S
(Univ. Tokyo, Tokyo)
MUSHIAKE K
(Univ. Tokyo, Tokyo)
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Journal Title;Proceedings of the Japanese Conference on Remote Sensing
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Journal Code:X0715A
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ISSN:
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VOL.26th;NO.;PAGE.29-32(1999)
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| Figure&Table&Reference;FIG.6, TBL.1, REF.7 |
| Pub. Country;Japan |
| Language;English |
| Abstract;The objective of this experiment, conducted in 1998, was to determine the effects of the dense vegetation canopy on the sensitivity of .SIGMA.0 to soil moisture(if any) at C-Band in comparison to its sensitivity for the other target characteristics. This article presents the results which hint towards the possibility of monitoring the microwave backscattering properties of the paddy crop over its growth period from the sowing of seeds in rows till maturation, as a function of frequency, polarization, incidence angle and crop maturity. The data indicate that the .SIGMA.0 is sensitive to both scatterometer system characteristics and the target characteristics. The time history of the .SIGMA.0 does show a correlation with the crop maturation and the morphological changes during the growth period. The study does suggest the possibility of estimating the paddy crop maturity and for monitoring the growth stages of the paddy crop. It has been found that with the paddy at low density at the initial stage of growth, the ground soil moisture content does contribute significantly towards the .SIGMA.0. The results show that with the density and volume of the crop going up with the growth of the paddy crop, the soil moisture contribution almost comes to a naught and the backscattering does only reflect the physiological, phenological, morphological and dielectric characteristics of the crop. (author abst.) |
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