| || Sensors for desert surveillance
Author : Chauhan, B. S.;David, E.;Datta, P. K.
Source : Defence Science Journal ; Vol:55(4) ; 2005 ; pp 493-503
Subject : 535 Optics
Keywords : Thermal imaging;Passive night vision sensors;Image intensifiers;ICCD;Infrared sensors;Hyperspectral imaging;Synthetic aperture radar;Automatic target recognition;Atmospheric turbulence;Optical mirage;Search and track systems
Abstract : Various types of sensors–visible, passive night vision, infrared, synthetic aperture radar, etc can be used for desert surveillance. The surveillance capability of these sensors depends to a large extent, on various atmospheric effects, viz., absorption, scattering, aerosol, turbulence, and optical mirage. In this paper, effects of various atmospheric phenomena on the transmission of signals, merits and demerits of different means of surveillance under desert environmental conditions are discussed. Advanced surveillance techniques, ie, multisensor fusion, multi and hyperspectral imaging, having special significance for desert surveillance, have also been discussed.