URAN explained

URAN (Ukrainian Radio Interferometer of NASU)^[1] (Ukrainian: Український Радіоіонтеферометр Академії Наук - УРАН) is an array of radio-telescopes, spread across Ukraine and used for long-baseline interferometry in the 8-40 MHz range. The most sensitive of the telescopes is UTR-2; URAN-1 (built in 1975 in Zmiiv (Kharkiv oblast)) and URAN-2 (construction started in 1979 in Stepanivka village near Poltava), URAN-3 is near Shatsk, in the north-west corner of Ukraine by the point where Poland and Belarus meet Ukraine, and URAN-4 (built in 1975) is in the south-west, a little west of Odesa and by the Moldovan border.

Auxiliary telescopes are URAN-1 has 96 dipoles in a 178 x 28m array; URAN-2 has 512 in a 238 x 118m; URAN-3 has 256 in a 238 x 58m; URAN-4 has 128 in 238 x 28m. Because of the small number of baselines, images from URAN tend to be produced by model-fitting to sums of Gaussians rather than by direct synthesis.

References

Most of the information in this article comes from Valeriy Shepelev's presentation http://www.lofar.org/workshop/26Apr07_Thursday03/LOFARWorkshop_Apr07_ValeriyShepelev.pdf at an April 2007 LOFAR workshop.

Further reading

• Book: S. Y. Braude. B. A. Dubinskii. N. L. Kaidanovskii. N. S. Kardashev. M. M. Kobrin. A. D. Kuzmin. A. P. Molchanov. Yu. N. Pariiskii. O. N. Rzhiga. A. E. Salomonovich. V. A. Samanian. I. S. Shklovskii. R. L. Sorochenko. V. S. Troitskii. K. I. Kellermann. A Brief History of Radio Astronomy in the USSR: A Collection of Scientific Essays. 2012. Springer Science & Business Media. 978-94-007-2834-9. 193.

Notes and References

1. Konovalenko. A.. Sodin. L.. Zakharenko. V.. Zarka. P.. Ulyanov. O.. Sidorchuk. M.. Stepkin. S.. Tokarsky. P.. Melnik. V.. 2016-04-28. The modern radio astronomy network in Ukraine: UTR-2, URAN and GURT. Experimental Astronomy. en. 42. 1. 11–48. 10.1007/s10686-016-9498-x. 0922-6435. 2016ExA....42...11K .