Multi-view synthesized aperture radar

This article considers synthesized aperture radar (SAR), developed and manufactured in Radio Astronomy Institute of Ukrainian Academy of Sciences. SAR operates in 3 cm frequency band and it intended for obtaining multi-view images from light-motor planes. Technical and scientific solutions found during design of this radar are described. Characteristics examples of obtained images are provided

Ground-based and spacecraft observations of lightning activity on Saturn

International audienceIn late 2007, Saturn electrostatic discharges (SED) were simultaneously observed at the radio telescope UTR-2 and with the Cassini spacecraft. Observations at UTR-2 were performed with a multichannel receiver in the frequency range 12-33MHz, and those performed on Cassini-with a swept frequency receiver that is part of the RPWS (Radio and Plasma Wave Science) instrument in the frequency band 1.8-16MHz. We got a very good coincidence between data of UTR-2 and Cassini. It is shown for the first time that ground-based radio astronomy lets us detect Saturn's lightning with a high degree of reliability despite terrestrial interferences. This is the necessary basis for further detailed study of the temporal and spectral characteristics of the SEDs with ground based radio telescopes. Based on six observation sessions, several parameters of SEDs were determined, in particularly a correlation of 0.77 ± 0.15 between the average intensity of storms and the e-folding time. [All rights reserved Elsevier]

Identification of Saturn Lightnings Recorded by the UTR-2 Radio Telescope and Cassini Spacecraft

International audienceThe Saturn electrostatic discharges (SED) simultaneously recorded in the initial period of storm F at the UTR-2 radio telescope and Cassini spacecraft are investigated. The UTR-2 used the FFT-spectral receiver operating 12÷33 MHz, while the Cassini the serial spectrum analyser RPWS (Radio Plasma Wave Science) operating 1.8÷16 MHz. The ground and space data processed have shown very good agreement. E-folding time of SED and its dependence on episode intensity in the initial period of storm F were determined

Identification of Saturn Lightnings Recorded by the UTR-2 Radio Telescope and Cassini Spacecraft

International audienceThe Saturn electrostatic discharges (SED) simultaneously recorded in the initial period of storm F at the UTR-2 radio telescope and Cassini spacecraft are investigated. The UTR-2 used the FFT-spectral receiver operating 12÷33 MHz, while the Cassini the serial spectrum analyser RPWS (Radio Plasma Wave Science) operating 1.8÷16 MHz. The ground and space data processed have shown very good agreement. E-folding time of SED and its dependence on episode intensity in the initial period of storm F were determined