Passive microwave radiation from soil: examples of emission models and observations

1995 ◽  
pp. 423-460
Keyword(s):  
Microwave Radiation ◽  
Passive Microwave ◽  
Emission Models

scholarly journals Development of a Parameterized Model to Estimate Microwave Radiation Response Depth of Frozen Soil

2019 ◽  
Vol 11 (17) ◽  
pp. 2028 ◽  
Author(s):  
Zhang ◽  
Jiang ◽  
Zhao ◽  
Chai ◽  
Li ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Sensitivity Analysis ◽  
Microwave Radiation ◽  
Microwave Remote Sensing ◽  
Frozen Soil ◽  
Passive Microwave ◽  
Radiation Response ◽  
Passive Microwave Remote Sensing ◽  
Wide Range ◽  
Parameterized Model

The sensing depth of passive microwave remote sensing is a significant factor in quantitative frozen soil studies. In this paper, a microwave radiation response depth (MRRD) was proposed to describe the source of the main signals of passive microwave remote sensing. The main goal of this research was to develop a simple and accurate parameterized model for estimating the MRRD of frozen soil. A theoretical model was introduced first to describe the emission characteristics of a three-layer case, which incorporates multiple reflections at the two boundaries. Based on radiative transfer theory, the total emission of the three layers was calculated. A sensitivity analysis was then performed to demonstrate the effects of soil properties and frequency on the MRRD based on a simulation database comprising a wide range of soil characteristics and frequencies. Sensitivity analysis indicated that soil temperature, soil texture, and frequencies are three of the primary variables affecting MRRD, and a definite empirical relationship existed between the three parameters and the MRRD. Thus, a parameterized model for estimating MRRD was developed based on the sensitivity analysis results. A controlled field experiment using a truck-mounted multi-frequency microwave radiometer (TMMR) was designed and performed to validate the emission model of the soil freeze–thaw cycle and the parameterized model of MRRD developed in this work. The results indicated that the developed parameterized model offers a relatively accurate and simple way of estimating the MRRD. The total root mean square error (RMSE) between the calculated and measured MRRD of frozen loam soil was approximately 0.5 cm for the TMMR’s four frequencies.

Simulation and measurement of relief effects on passive microwave radiation

2010 ◽  
Author(s):  
Xinxin Li ◽  
Lixin Zhang ◽  
Lingmei Jiang ◽  
Shaojie Zhao ◽  
Tianjie Zhao
Keyword(s):  
Microwave Radiation ◽  
Passive Microwave

Snow depth and snow cover retrieval from FengYun3B microwave radiation imagery based on a snow passive microwave unmixing method in Northeast China

2014 ◽  
Vol 8 (1) ◽  
pp. 084682 ◽  
Author(s):  
Lingjia Gu ◽  
Ruizhi Ren ◽  
Kai Zhao ◽  
Xiaofeng Li
Keyword(s):  
Snow Cover ◽  
Microwave Radiation ◽  
Snow Depth ◽  
Northeast China ◽  
Passive Microwave

scholarly journals Snow crystal orientation effects on the scattering of passive microwave radiation

2000 ◽  
Vol 38 (5) ◽  
pp. 2430-2434 ◽  
Author(s):  
J.L. Foster ◽  
J.S. Barton ◽  
A.T.C. Chang ◽  
D.K. Hall
Keyword(s):  
Microwave Radiation ◽  
Crystal Orientation ◽  
Passive Microwave ◽  
Orientation Effects ◽  
Snow Crystal

Effects of snow crystal shape on the scattering of passive microwave radiation

1999 ◽  
Vol 37 (2) ◽  
pp. 1165-1168 ◽  
Author(s):  
J.L. Foster ◽  
D.K. Hall ◽  
A.T.C. Chang ◽  
A. Rango ◽  
W. Wergin ◽  
...  
Keyword(s):  
Microwave Radiation ◽  
Passive Microwave ◽  
Crystal Shape ◽  
Snow Crystal

Snow crystal and land cover effects on the scattering of passive microwave radiation for algorithm development

2001 ◽  
Author(s):  
James L. Foster ◽  
J. S. Barton ◽  
Alfred T. C. Chang ◽  
Dorothy K. Hall
Keyword(s):  
Land Cover ◽  
Microwave Radiation ◽  
Passive Microwave ◽  
Algorithm Development ◽  
Snow Crystal
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