寇小康等:Modeling of the Permittivity of Holly Leaves in Frozen Environments
被阅读 1013 次
2015-10-16
Modeling of the Permittivity of Holly Leaves in Frozen Environments
作者:Kou, XK (Kou, Xiaokang)[ 1,2,3 ] ; Chai, LN (Chai, Linna)[ 1,2,3 ] ; Jiang, LM (Jiang, Lingmei)[ 1,2,3 ] ; Zhao, SJ (Zhao, Shaojie)[ 1,2,3 ] ; Yan, S (Yan, Shuang)[ 1,2,3 ]
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
卷: 53  期: 11  页: 6048-6057
DOI: 10.1109/TGRS.2015.2431495
出版年: NOV 2015
 
摘要
The dielectric property of vegetation has a considerable effect on the characteristics of the microwave radiation of vegetation. In frozen environments, when the temperature is colder than normal, changes such as increased soluble sugar and decreased moisture content (MC) can occur in the vegetation. The dielectric property of vegetation, which is almost entirely controlled by its free and bound water content, will also change. To characterize the dielectric behavior of vegetation in frozen regions, a sensitive experiment was conducted on holly leaves with a high-performance coaxial probe over a frequency range from 0.5 to 40 GHz and a temperature range from 0 degrees C to -20 degrees C. Based on the measurements and the physical properties of the constituent substances of vegetation, a semiempirical dielectric model for holly leaves in low temperature environments was developed. In this model, a decrease in MC, which causes a reduction in the complex permittivity, was described as an increase in the ice content. The complex permittivity of bound water was measured using a saturated sucrose solution at -6.5 degrees C. The research will provide a reference for the dielectric property study of the vegetation in frozen environments.
 
通讯作者地址: Chai, LN (通讯作者)
Beijing Normal Univ, State Key Lab Remote Sensing Sci, Res Ctr Remote Sensing, Beijing 100875, Peoples R China.
地址:
[ 1 ] Beijing Normal Univ, State Key Lab Remote Sensing Sci, Res Ctr Remote Sensing, Beijing 100875, Peoples R China
[ 2 ] Beijing Normal Univ, GIS, Beijing 100875, Peoples R China
[ 3 ] Beijing Normal Univ, Sch Geog, Beijing 100875, Peoples R China