RADIO PHYSICS AND RADIO ASTRONOMY

The paper presents the functional diagram and principle of operation of a portable HF receiving complex intended for measuring angles of arrival, Doppler frequency shifts and group time delays of probe signals used for remote radio sensing of the ionosphere. The complex has been developed on the basis of a single-channel digital receiver, and includes a multiplexor, personal computer and three spaced antennas to allow estimating angles of arrival by the phase-difference direction finding technique with Doppler frequency filtering. The principle of the technique and algorithm of estimating the signal trajectory parameters used in the receiver complex with a multiplexor are briefly described. Results of laboratory and field tests of the portable complex are presented. Data of synchronous measurements of HF signal angles of arrival using the developed complex and two other instruments, specifically, the UTR-2 decameter wavelength radio telescope and analogous three-channel complex of frequency-and-angular sounding of the ionosphere (FASI), are compared.

Key words: receiving complex, multiplexer, phase difference, angles of arrival

Manuscript submitted 08.01.2014

1. BELEY, V. S., GALUSHKO, V. G., PAZNUKHOV, D., REINISCH, B. W., and YAMPOLSKY, Y. M., 2000. HF Radar Sounding of TIDs with theUse of the DPS System and Signals from Broadcasting Stations. In: Proc. of PIERS-2000. Cambridge, MA(USA), p. 602.

2. AFRAIMOVICH, E. L., 1982. Interference methods of radio sounding of the ionosphere. Moskow: Nauka (in Russian).

3. BRAUDE, S. Y., MEGN, A. V. and SODIN, L. G., 1978. Decameter wave band radio telescope UTR-2. In: Anteny. Moscow, USSR: Svyaz'. no. 26, pp. 3–15 (in Russian).

4. GALUSHKO, V. G. AND KASCHEEV, A. S., 2006. Frequency-and-Angular Sounding of Traveling Ionospheric Disturbances in the Model of 3D Electron Density Waves Propagating in a Real Ionospheric Layer. Radio Phys. Radio Astron. vol. 11, no. 3, pp. 242–253 (in Russian).

5. GALUSHKO, V. G. and LITVINENKO, G. V., 2001. Recovering the Three-Dimensional Structure of Ionospheric Electron Density Distribution by Angular-and-Frequency Sounding. Radio Phys. Radio Astron. vol. 6, no. 3, pp. 222–229 (in Russian).

6. PIKULIK, I., KASHCHEYEV, S., GALUSHKO, V., and YAMPOLSKY, Yu., 2003. HF-receiver Equipment for Frequency-and-Angular Sounding of the Ionosphere in Antarctica. Ukrainian Antarctic journal, no. 1, pp. 61–69 (in Russian).

7. KASHCHEYEV, S. B, GALUSHKO, V. G., KOLOSKOV, A. V., PIKULIK, I. I., and YAMPOLSKY, Yu. M., 2012. Multifunctional receiving complexes of HF range for research of dynamic processes in the ionosphere. Electromagnetic methods of exploring the surrounding space. In: Proc. of 1th Ukraine conference EMES, Kharkov, Ukraine, p. 308 (in Russian).

8. GALUSHKO, V. G., KASHCHEYEV, A. S., KASHCHEYEV, S. B., KOLOSKOV, A. V., PIKULIK, I. I., YAMPOLSKI, Y. M., LITVINOV, V. A., MILINEVSKY, G. P., and RAKUSA-SUSZCZEWSKI, S., 2007. Bistatic HFdiagnostics of TIDs over the Antarctic Peninsula. J. Atmos. Sol.-Terr. Phys. vol. 69, Iss. 4–5, pp. 403–410. DOI: https://doi.org/10.1016/j.jastp.2006.05.010

9. WINRADIO. G313 HF Receiver. User's Guide. Melbourn: WINRADIO Communications, 2005.