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Poster Session
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Correlation between spectral signature of basalts & sandstones of Central India as obtained by Radiometric & Spectrophotometric
Techniques
Dr. S. K. Soni, Dr. A. N. Patel
S.G.S. Institute of Technology & Science Indore (M.P.) India
Abstract
Spectral signature of a feature comprises of a set of values for the reflectance or radiance of the feature where each value corresponds to the reflectance or radiance arranged over a different well defined wavelength interval. The present work embodies an attempt to analyse the spectral signature of Basalts and sandstones which are major litho stratigraphical units of Central India using Radiometric & Spectrophotometric techniques. The study revaled that Laboratory reflectance studies as obtained by spectrophotometric has higher value as compend to insitu value as obtained by Radiometric, It was further observed that spectral signature of sandstone varies with chemical composition colour and texture white on the other head for Basalts there was no change in the percentage reflectance in the wavelenght ranging to from 550 nm to 950 nm.
Introduction
The word signature by definition is referred in general to a distinguishing characteristics. In Remote Sensing spectral signature of feature comprises a set of values for the reflectence or radiance of the feature where each value corresponds to the reflectance or radiance arranged over a different well defined wavelength interval.
Spectral Radiometers permits in situ measurements of reflectance from vegetation canopies using incident solar radiation as the illuminent. Measurement s can be made at different angles of view. Spectroradiometer provide data more closely stimulating the energy recorded by remote sensors.
Spectral Radiometers permits in situ measurements of reflectance from vegetation canopies using incident solar radiation as the illuminent. Measurements can be made at different angles of view. spectroradiometer provide data more closely stimulating the energy recorded by remote sensors.
Spectrophotometers measures the hemispherical reflectance. In the laboratory studies spectral signature is obtained from measurements using spectrophotometer. The measurements are the distribution of reflectance of a material as a function of wavelength, compared to that of a diffuse white surface. The spectral resolution of the measurements is generally 0.001 mm.
Area of study
The area selected for the study is the area around Central Narmada basin. The rocks in this area shows numerous Geological significance.
The co-ordinates of the selected area are bounded by the following limits:
| 77°00' E - 79°00' E |
| 22°00' N - 24°00' N |
Geological Succession:
The Geological succession of the area selected for the study is:
- Pleistocene and Recent formations along the Narmada catchments.
- Deccan Trap.
- Upper Palaeozoic and lower Gondwanas.
- Archean.
During the research work field studies were carried out for the earlier selected sites, field work comprised of:
- To take the radiometric observation for the major litho stratigraphical units of the area.
- To collect the rock samples for laboratory anlysis of the spots where the radiometric observations were taken.
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