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The Institute of Terrestrial Magnetism,
the
Ionosphere
and Wave Propagation-. -Academy of Selene e s USSR, has
|
designed a spectrum analyzer for determining the in-
|
stantaneous frequency of variable atmospheric
inter-
;
ference signals with an average frequency variation
ratio of about 2rl0 4 c/sec »sec*
The signals are re-
corded on a tape recorder and transcribed on a tape
|
loop
(full time of rotation,
1.5-2.75 sec).
Change
ofs.
frequency with time can be observed visually by an
os-|
cllloscope.
The raster has 50 lines with each tenth
;
line brightened for better reading.
The analyzer has
i
four frequency ranges
(0-4,
0-12,
0-6,
and 0-20 kc).
|
A block diagram of the
1 analyzer circuit and signal
>
spectrograms are given.
(Likhter, Ya.I.# S.M.
Prozumerv;
shchikov,* anid Ya.P. Sobolev.
Pribory
i tekhnlka ek-
j
sperimenta,
no.
1, Jan 19&1#
96-99) S/120/61/000/001
September i960 marked the 10th anniversary of the Irkutsk laboratory of time
.
and frequencies
of the all-union institute of physico-technical and radio-technical
measurements .
The
laboratory's rather small collective determines local time by
Ineasurement of moving heavenly bodies, transmits exact time
signals, and controls
transmission
of such signals by domestic and foreign radio stations.
The volume
of scientific research performed by the
laboratory has expanded considerably in
a comparatively short time.
The laboratory has been augmented by new, more modern
equipment which permits scientific work with extreme accuracy.
This year, far
example, new apparatus is being used to transmit signals with a deviation from
absolute accuracy of only
.0002 (two
ten-»thousandths)
of a second.
To obtain these
results,
the equipment had to be improved locally, which was done by a group under
Perkholcutskiy, senior scientific worker of the laboratory.
This laboratory was
tbs
first in the USSR to begin use of the Danjon prismatic astrolabe,
a device for
astronomic measuring of ephemerides.
Instruments have been converted for
semi"automatic and individual observations, and much other work has been done.
(Text)
(Irkutsk, Russian,
Sept.
29,
i960,
1100 GMT)
SG1C Approved For Release 2001/03/26 : CIA-RDP96-00787R000500130083-4 Approved For Release 2001/03/26 : CIA-RDP96-00787R000500130083-4