 | Missile guidance |
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 | Advances in active radar seeker technology
Author : Das, Rajatendu
Source : Defence Science Journal ; Vol:55(3) ; 2005 ; pp 329-336
Subject : 629.7 Aeronautics;629.76 Rockets and Missiles ;629.762 Missiles
Keywords : Active radar seekers;Antennas;Missile guidance;Seeker technology;Coherent monopulse;Tracker configuration;Target tracking;Target identification;Target detection;Active electronically scanned array
Abstract : Active radar seekers have gained wide applications in the terminal phase of missile guidance to provide hit-to-kill capability. Till recently, coherent monopulse tracker configurations were being used extensively for air-to-air missile seekers as well as surface-to-air missile seekers, while special real-beam technique-based seekers have been employed in antiship and land-attack systems. In this paper, features of active radar seekers have been described against different targets and background conditions to bring out the fact that the seeker design is highly application-specific in nature. The emerging trends in radar seeker technology have been identified wrt ever-changing threat scenario coupled with newer electronic countermeasure techniques, including the latest developments in components, subsystems, as well as implementation aspects. |
| | Adaptive estimation of line of sight rate measurement from a radio frequency seeker
Author : Tapas, Anand M.;Prabhakar, N.;Srinivasa Rao, V.
Source : Defence Science Journal ; Vol:55(3) ; 2005 ; pp 307-312
Subject : 629.7 Aeronautics;629.76 Rockets and Missiles ;629.762 Missiles
Keywords : RF seeker ;Missile guidance;Miss distance;Guidance;Control;Line of sight rate measurement;LOS rate estimation;Tactical missile;Guidance command computation;Homing phase guidance
Abstract : The line-of-sight (LOS) rate output from a radio frequency (RF) seeker is widely used during the homing phase guidance of a tactical missile. The LOS rate is noisy and needs to be filtered. The application of an adaptive Kalman filter for the LOS rate state estimation has been studied. This filter requires minimal a priori knowledge about technical parameters of the seeker. It is also capable of estimating the variable noise statistics. |
| | Evaluation of Losses in Pedestal Supported Finlines
Author : Sural Majumdar, S. ;Gupta, B.
Source : Defence Science Journal ; Vol:49(3) ; 1999 ; pp 235-242
Subject : 629.76 Rockets and Missiles ;621.396.9 Radars
Keywords : Missile guidance ;Millimeter waves;Radars
Abstract : "A technique for evaluation of conductor and dielectric losses in pedestal-supported finlines using mixed spectral domain approach has been presented. All field components were computed through application of Galerkin' s technique in spectral domain, assuming weighted basis functions to represent unknown electric voltages, i.e., magnetic currents. In the process, the propagation constant along the line was also accurately computed. The aim was to study attenuation behaviour of these lines wrt variation in dimensional and other structural parameters. The results indicated a specific dimensional range within which their use is justifiable. The potential defence applications of pedestal-supported finlines is in millimeter wave systems, e.g., radars, missile guidance systems, etc. " |
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