| タイトル | Effect of species structure and dielectric constant on C-band forest backscatter |
| 本文（外部サイト） | http://hdl.handle.net/2060/19940007413 |
| 著者（英） | Khadr, N.; Leckie, D.; Lang, R. H.; Kilic, O.; Landry, R.; Chauhan, N. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1993-01-01 |
| 言語 | eng |
| 内容記述 | A joint experiment between Canadian and USA research teams was conducted early in Oct. 1992 to determine the effect of species structure and dielectric variations on forest backscatter. Two stands, one red pine and one jack pine, in the Petawawa National Forestry Institute (PNFI) were utilized for the experiment. Extensive tree architecture measurements had been taken by the Canada Centre for Remote Sensing (CCRS) several months earlier by employing a Total Station surveying instrument which provides detailed information on branch structure. A second part of the experiment consisted of cutting down several trees and using dielectric probes to measure branch and needle permittivity values at both sites. The dielectric and the tree geometry data were used in the George Washington University (GWU) Vegetation Model to determine the C band backscattering coefficients of the individual stands for VV polarization. The model results show that backscatter at C band comes mainly from the needles and small branches and the upper portion of the trunks acts only as an attenuator. A discussion of variation of backscatter with specie structure and how dielectric variations in needles for both species may affect the total backscatter returns is provided. |
| NASA分類 | EARTH RESOURCES AND REMOTE SENSING |
| レポートNO | 94N11885
NASA-TM-109219
NAS 1.15:109219 |
| 権利 | No Copyright |
