Theoretical and Experimental Studies of Snow Covers Microwave Emissivity
作者:
D.A. Boyarskij,
V.V. Dmitriev,
N.I. Kleeorin,
V.G. Mirovskij,
V.S. Etkin,
期刊:
Journal of Electromagnetic Waves and Applications
(Taylor Available online 1993)
卷期:
Volume 7,
issue 7
页码: 959-970
ISSN:0920-5071
年代: 1993
DOI:10.1163/156939393X00138
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Microwave radiometers, operating at 3.95, 19.5, 37.5 and 150 GHz and placed in a tower, were used for snow measurements during the winters of 1985-1989. The effects of snow structure, wetness, and grain size were examined in detail. The emissivity of snowpack has been calculated by a quasi-static method and by applying the equation of radiative transfer. The latter takes into account the physical-mechanical properties of the real snowpack obtained by direct glaciological methods. The experimental data are compared against theoretical results. The quasistatic model is shown to be adequate for f < 20 GHz whereas the radiative transfer model agrees for f < 150 GHz, especially when the size distribution of ice particles in snow is included.
点击下载:
PDF (556KB)
返 回