TR-39 : Study of spectral reflectance characteristics of various ground features around Roorkee area including Doon valley

Abstract

Spectral reflectance studies based on signature measurement are carried out to determine the spectral response patterns of different earth surface features. For effective utilization of multispectral data acquired from satellite sensors, spectral reflectance characteristics of different features are needed to be known.

In this study spectral data were collected using a portable grating type radiometer at different wavelengths ranging from 0.40 to 1.02 µm. The data were collected on different dates, in Roorkee and its surrounding areas. The spectral reflectance for various features were measured in four spectral bands within the visible and near infrared wavelengths corresponding to Landsat Multispectral Scanner (MSS). An attempt was also made to compute and study various ratio values. The spectral reflectance characteristic curves were studied for various features from spectral reflectance values collected. In the end, a comparison of spectral response of various earth features have been made. Based on these studies most appropriate spectral range for identifying a particular feature type has been suggested.