A SIMPLE-MODEL FOR RETRIEVING BARE SOIL-MOISTURE FROM RADAR-SCATTERING COEFFICIENTS

NCU Institutional Repository > 研究中心 > 太空及遙測研究中心 > 期刊論文 > Item 987654321/27690

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27690

題名:	A SIMPLE-MODEL FOR RETRIEVING BARE SOIL-MOISTURE FROM RADAR-SCATTERING COEFFICIENTS
作者:	CHEN,KS;YEN,SK;HUANG,WP
貢獻者:	太空及遙測研究中心
關鍵詞:	SURFACE;BACKSCATTERING;DEPENDENCE;ROUGHNESS
日期:	1995
上傳時間:	2010-06-29 18:52:18 (UTC+8)
出版者:	中央大學
摘要:	A simple algorithm based on a rough surface scattering model teas developed to invert the bare soil moisture content from active microwave remote sensing data. In the algorithm development, a frequency mixing model was used to relate soil moisture to the dielectric constant. In particular, the Integral Equation Model (IEM) was used over a wide range of surface roughness and radar frequencies. To derive the algorithm, a sensitivity analysis was performed using a Monte Carlo simulation to study the effects of surface parameters, including height variance, correlation length, and dielectric constant. Because radar return is inherently dependent on both moisture content and surface roughness, the purpose of the sensitivity testing was to select the proper radar parameters so as to optimal by decouple these two factors, in an attempt to minimize the effects of one while the other was observed. As a result, the optimal radar parameter ranges can be chosen for the purpose of soil moisture content inversion. One thousand samples were then generated with the IEM model followed by multivariate linear regression analysis to obtain an empirical soil moisture model. Numerical comparisons were made to illustrate the inversion performance using experimental measurements. Results indicate that the present algorithm is simple and accurate, and can be a useful tool for the remote sensing of bare soil surfaces.
關聯:	REMOTE SENSING OF ENVIRONMENT
顯示於類別:	[太空及遙測研究中心] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	503	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....