DISCUSSION OF RUSSIAN SCIENTIFIC RESEARCH FACILITIES /SYSTEMS

• Document Type: CREST
• Collection: STARGATE
• Document Number (FOIA) /ESDN (CREST): CIA-RDP96-00787R000500130007-8
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 2
• Document Creation Date: November 4, 2016
• Document Release Date: October 13, 1998
• Sequence Number: 7
• Publication Date: September 26, 1984
• Content Type: LIST

Approved For Release 2001/03/26 CIA-RDP96-00787R000500130007-8
~s
fixed and movable antennas (five-element system in Cambridge/UK, radiotele-
scopes with North-South or East-West orientable antenna in Parks/AUSTRALIA),
and millimetric-wave interferometers (two-antenna interferometer on Hat Creek/
CALIFORNIA, two-antenna interferometers in Jet Propulsion Laboratory/CALIFORNIA
and on Table Mountain/UNION OF SOUTH AFRICA, two-antenna interferometer in
Bordeaux/FRANCE). Figures 9; tables 1; references 39: 6 Russian, 33 Western.
[125-2415]
UDC 523.164:621.396
METRIC-WAVE AND DECIMETRIC-WAVE APERTURE SYNTHESIS SYSTEMS (REVIEW)
Gorkiy IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY: RADIOFIZIKA in Russian Vol 26,
No 11, Nov 83 pp 1394-1402
ILYASOV, Yu. P., Institute of Physics imeni P. N. Lebedev, USSR Academy of
Sciences
[Abstract] Aperture synthesis systems using metric or decimetric waves are
adequate and promising for astrophysical study of extragalactic radioemission
sources, operation with metric waves being characterized by destabilizing
effects of the ionosphere and thus requiring special methods of data processing.
Methods of closure phase and closure amplitude have been proposed and then
successfully implemented in very-large-baseline radiotelescopes and multi-
element interferometers, respectively. Several radiotelescopes have been
developed which operate in the supersynthesis mode, with rotation of the earth
used for filling the space-frequency plane. Further achievements include the
Swarup system (Uti/INDIA) with phase-stable interferometer, the Jodrell Bank
system (Manchester/UK), the Palmer MERLIN multielement system (UK) with CLEAN
procedure and CORTEL telescope correction algorithm, the VLA system (USA),. and
the international giant equatorial radiotelescope. Figures 3; references 25:
7 Russian, 18 Western (1 in Russian translation).
[125-2415]
CROSS-SHAPED APERTURE SYNTHESIS SYSTEM
UDC 520.27+520.874
Gorkiy IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY: RADIOFIZIKA in Russian Vol.26,
No 11, Nov 83 p~ 403-11+19 VW ~~'6 ~~
SMOL'KOV. G. Za., Sibs Institute of Te I s he nd
Radiowave Propagation, Siberian epa meat, USSR Academy o cie
[Abstract] A radiotelescope with a cross-shaped parallel-sequential aperture
synthesis system is being installed in Siberia for the purpose of radiohelio-
graphic research, particularly for study of solar active regions and bursts.
The design of this facility takes into account peculiarities of the sun as a
radioemission source, namely its continuous and sometimes fast as well as wide
Approved For Release 2001/03/26 : CIA-RDP96-00787R000500130007-8
 Approved For Release 2001/03/26 : CIA-RDP96-00787R000500130007-8
variation, sudden buildup of new activity, diversity of processes and forma-
tions, wavelength dependence of the extent of activity spread, nonuniform
large-scale and small-scale structure, and effect of the sun's rotation on loca-
tion and form of observable objects. In order to cope with solar dynamics, it
was foremost necessary to ensure an angle resolution adequate for visible and
x-ray images by appropriate spacing of antenna arrays over a large area. With
an attainable resolution of 20"x20", it is possible to synthesize 35'x35' radio
images of the solar disk with centimetric waves. The entire facility includes
an east-west array of 16 antennas, a north-south and east-west Mills-
Christiansen cross with 64 antennas in each arm, a tracking system, an
automatic channel phasing system, a receiver complex, a generator of refer-
ence voltages, a frequency modulator, and all this interfaced to an automation
system with peripheral equipment through a communication and data exchange link.
The receiver complex consists of an outlying low-noise microwave amplifier in
a thermostat, four wideband microwave filters with different center frequencies
and a common microwave heterodyne oscillator, a metric-wave attenuator with
program control, a multifrequency detector, a reference-frequencies base, and
a generator of test noise signal for calibration and inspection. Preliminary
and pilot measurements made with this facility have yielded one-dimensional
distributions of solar radioluminance and microwave source intensity, buildup
and distribution of circular polarization, sudden buildup and transient atten-
uation of microwave source, intensity, and local polarization flicker.
Figures 14; references 39: 26 Russian, 13 Western (3 in Russian translation).
[125-2415]
UDC 522.2:523.164
DECIMETRIC-WAVE APERTURE SYNTHESIS SYSTEM AT SCIENTIFIC-RESEARCH INSTITUTE OF
RADIOPHYSICS
Gorkiy IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY: RADIOFIZIKA in Russian Vol 26,
No 11, Nov 83 pp 1420-1427
BEAGON, V. S. DUGIN, N. A., ROMANYCHEV, A. A., SEMENOVA, L. R., TURCHIN, V. I.
and TSEYTLIN, N. M., Scientific-Research Institute of Radiophysics
[Abstract] Development and design of the decimetric-wave aperture synthesis
system at the Scientific-Research Institute of Radiophysics began in 1970; its
installation was completed and its operation began in 1979. Its main element
is a two-antenna (D= 7 m) interferometer with fixed baseline length (417 m)
for operation at the 56-cm wavelength in the supersynthesis mode, utilizing the
earth's rotation. Its other basic components, developed and produced in var-
ious stages of the project, are a receiver complex, a communication link and
phase calibration system, and an automatic measuring and data processing system
with an "Elektronika D3-28" microcomputer. The receiver complex consists of a
hybrid superheterodyne with phase-lock automatic frequency control and two
frequency converters, a single-sideband one and a double-sideband one. The
first converter consists of high-frequency stages, is followed by a balancing
mixer and an intermediate-frequency (60+10 MHz) preamplifier. The second con-
verter is an ampliphase meter. The facility also contains equipment for.
Approved For Release 2001/03/26 : CIA-RDP96-00787R000500130007-8