RADIO PHYSICS AND RADIO ASTRONOMY

Facilities for measurement of angular characteristics of the sources associated with solar radio emission at decameter wavelengths have been developed. The measurement method is based on the interferometer approach using the sectional structure of the UTR-2 radio telescope. A simple method of observation and data reduction is described which does not require antenna calibration. The observations of the quiet Sun and bursts of its sporadic activity have been made that enables to determine the angular size of sources and their relative position.

Key words: interferometer, angular size, Sun, type III bursts

Manuscript submitted 22.01.2015

Radio phys. radio astron. 2015, 20(1): 20-29 

REFERENCES

1. ABRANIN, E. P. and BAZELYAN, L. L., 1986. Radio Emission from the Quiet Sun at Decameter Wavelengths. Preprint, no. 304. Kharkiv: Radiophysics and Electronics Institute AN UkSSR Publ. (in Russian).

2. BRAZHENKO, A. I., KOVAL, A. A., KONOVALENKO, A. A., STANISLAVSKYY, A. A., ABRANIN, E. P., DOROVSKYY, V. V., MELNIK, V. N., VASHCHISHIN, R. V., FRANTSUZENKO, A. V. and BORYSYUK, O. V., 2012. Peculiarity of Continuum Emission from Upper Coronaof the Sun at Decameter Wavelengths. Radio Phys. Radio Astron. vol. 17, no. 1, pp. 3–14 (in Russian).

3. ABRANIN, E. P., BAZELYAN, L. L., GONCHAROV, N. Yu., ZAITSEV, V. V., ZINICHEV, V. A., RAPOPORT, V. A. and TSYBKO, Ya. G., 1976. Angular Dimensions of Sources of Solar Decametric Radio Bursts. Soviet Astron. vol. 19, no. 5, pp. 602–605.

4. STANISLAVSKYY, A. A., ABRANIN, E. P., KONOVALENKO, A. A. and KOVAL, A. A., 2011. Heliograph of the UTR-2 Radio Telescope. I. General Scheme. Radio Phys. Radio Astron. vol. 16, no. 1, pp. 5–14 (in Russian).
https://doi.org/10.1615/radiophysicsradioastronomy.v2.i3.10

5. CHEN, H. S.-L. and SHAWHAN, S. D., 1978. Structure and evolution of solar radio bursts at 26.4 MHz. Sol. Phys. vol. 57, is. 1, pp. 205–227. DOI: https://doi.org/10.1007/BF00152055

6. RASHKOVSKIY, S. L., BELOV, A. S., IVANOV, A, S., LOZINSKIY, A. V. and SHEPELEV, V. A., 2012. The URAN's New Facilities and Software. Radio Phys. Radio Astron. vol. 17, no. 3, pp. 207–217 (in Russian).

7. BRAUDE, S. Ya., MEGN, A. V. and SODIN, L. G., 1978. Decameter Waveband UTR-2 Radio Telescope. In: Antennas. Moscow, Russia: Svyaz' Publ. is 26, pp. 3–14.

8. RASHKOVSKIY, S. L., SHEPELEV, V. A., INYUTIN, G. A. and VASHICHIN, R. V., 2013. Measurements of Radio Source Flux Density with the Interferometer Network URAN. Radio Phys. Radio Astron. vol. 18, no. 4, pp. 291–300 (in Russian).

9. RYABOV, V. B., VAVRIV, D. M., ZARKA, P., RYABOV, B. P., KOZHIN, R., VINOGRADOV, V. V. and DENIS, L., 2010. A low-noise, high-dynamic-range, digital receiver for radio astronomy applications: An efficient solution for observing radio-bursts from Jupiter, the Sun, pulsars, and other astrophysical plasmas below 30 MHz. Astron. Astrophys. vol. 510, id. A16. DOI: https://doi.org/10.1051/0004-6361/200913335