COMPARISONOF SURFACE REFLECTACE BETWEEN FIELD SPECTRORADIOMETERAND MULTI SATELLITE IMAGE FOR CROP MONITORING

摘要

Multispectral images are a good source of crop, soil, and ground coverage information. Spectral reflectance provides a useful tool for monitoring crop growing status. A series of optical image were obtained by Landsat multispectral imaging system on the maize field. Landsat TM data acquired with a ground based from FieldSpec~® at the same period, for based on the absolute radiometric calibration of the multispectral and the use of a radiative transfer program for atmospheric correction.The study is aims to collect and to analyze spectral surface reflectance characteristics of maize at Pattananikom district, Lopburi province in the central of Thailand. Field spectroradiometer of spectral surface reflectance measures different growth stages of crop in the wavelength range 350 - 1075 nm. Following surface reflectance in bands includingBLUE, GREEN, RED and NIR calculated to compare between field spectroradiometer and satellite imagery.The spectral reflectance of the wavelength relatebetween the reflectance of the FieldSpec® and satellite imagery.