Estimation of soil-type heterogeneity effects in the retrieval of soil moisture from radiobrightness

被引：27

作者：

Galantowicz, JF

Entekhabi, D

Njoku, EG

机构：

[1] MIT, Ralph M Parsons Lab, Dept Civil & Environm Engn, Cambridge, MA 02139 USA

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91106 USA

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2000年 / 38卷 / 01期

关键词：

microwave radiometry; moisture models; soil coupled heat; soil moisture; spatial heterogeneity;

D O I：

10.1109/36.823924

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We estimate the magnitude of the beam-filling error due to soil-type heterogeneity in the determination of sensor-footprint average soil moisture (<(theta)over bar>(f)) retrieved from remote L-band radiometer measurements. Sets of randomly chosen soils are given uniform initial wetness and are subjected to atmospheric drying ol er 15 days in a numerical model. Results indicate that soil heterogeneity contributes less than 0.7% volumetric soil-moisture error (0.007 m(water)(3)/m(soil)(3)).

引用

页码：312 / 316

页数：5