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In the paper, an X-band airborne SAR system developed and produced at the Institute of Radio Astronomy is described. The system is designed to be operated from light-weight aircrafts. Implemented hardware and real-time software solutions are discussed. Several original approaches to the post-processing of the recorded data are considered. Experimental results are also presented and discussed.
In this paper, a recently developed digital receiver which satisfies to a large extent the modern requirements to such devices is presented. This receiver has been tested at the decameter radio telescope UTR-2. It is well known that the negative impact of radio frequency interference (RFI) on the quality of data is a matter of increasing concern especially for the low frequency radio astronomy.
In this paper, Doppler signal processing having a large potential for further developing and gaining new applications have been demonstrated. This has been illustrated by several examples related with the estimation of the SAR platform orientation angles from the radar returns, improving quality of SAR images based on a high-accuracy estimation of the Doppler rate, and retrieving 3D topography of...
Advances in the design, realization, and investigation of the clinotron-based synthesized oscillators for THz-regions are considered. A high output power level, a fast frequency sweep, and a high frequency resolution are the characteristic features of the oscillators. The discussed synthesized oscillators benefit from advanced phase locking technique and an original high-voltage power supply. The...
A Ku-band airborne SAR with Doppler centroid estimation, autofocusing, and indication of moving targets has been recently developed and tested at the Institute of Radio Astronomy of the National Academy of Sciences of Ukraine. This paper describes the setup of this instrument, its main components, and the signal processing technique introduced. Results obtained during the first flight tests are summarized...
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