Characteristics Optimization of an Aviation Synthetic Aperture Radar and Its Micro-Navigation System


Аuthors

Starovoitov E. I.*, Yurchik I. A.

Radio Engineering Corporation “VEGA”, 34, Kutuzovskiy prospekt, Moscow, 121170, Russia

*e-mail: evgstarovojtov@yandex.ru

Abstract

Falling of separable modules of launch vehicles occurs after space launches. Detected separable modules of launch vehicles are being evacuated from the impact area for further utilization. Search operations in a hard-to-reach terrain may take a good deal of time and require heavy spending. The authors suggest employing airborne synthetic aperture radar (SAR) for operational search and detection of separable modules of launch vehicles. This radar characteristics may differ from the analogs at hand.

An inertial micro-navigation system is employed to improve data quality being acquired by SAR. Currently, micro-navigation systems are employed in a great number of airborne SARs

Measuring error of the micro-navigation system is determined primarily by the the errors of its sensitive elements (accelerometers and gyros).

The types of sensitive elements applied in inertial units, and gyro errors correcting techniques of micro-navigation system, accumulated while long-term operation, are described. Analysis of requirements placed to micro-navigation system with inertial blocks based on laser gyros was performed.

For the assessment, it is assumed, that the aircraft-carrier flight is performed at an altitude of 9 km with a speed of 200 m/s. Characteristics of SAR, operating in Ku, X and C frequency bands, and sensitive elements of the units were determined for this initial data.

Based on Pareto sets, a technique for optimizing the inertial block mass (with account for the laser gyroscopes drift) of the micro-navigation system, and permissible error in the radial velocity measuring was developed. The same technique may be employed to optimize the inertial block size.

The results of this work may be used for developing airborne various purpose SARs.

Keywords:

synthetic aperture radar, micro-navigation system, laser gyro, aircraft, detection, separable modules of launch vehicles, optimization

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