OBSERVATIONS OF A RADIO EMISSION OF THE SUN AT IZMIRAN.
A.A. Gnezdilov, R.V. Gorgutsa, A.K. Markeev
The first observations of a radio emission of the Sun at the Solar
Radio
Laboratory of IZMIRAN have been carried
out in the 1949 year. The beginning
of
regular observation, which form the almost uninterrupted
37-year-long
line of data, was connected with a
preparation to International Geophysical
Year and, after that, to IQSY.
It's clear from Tables below (Bank of data... and
Database...), that
in
1956 - 1957 yrs. daily
(06:00 - 12:00 UT) observations of the flux
density
of the radio emission of the
whole Sun have been started at the
fixed
frequencies 204 and 600 MHz. The
observational complex was extended
in next years.
Since the January,
1961 have been carrying out the
observations by
radiospectrograph 90 - 45 MHz, which register dynamic spectra
of the solar
radio
emission. Up to
recent time there was the only regular
such kind
observations in our country. Now the observations by radiospectrographs are
carrying out at a more wide frequency range, which exceed 2.5 octaves (280
- 45 MHz).
The flux density
of the radio emission of
the Sun at 3 GHz has
regularly registering since the
October, 1967. Since the August, 1968 and
June,
1972 some programs
of an investigation of the polarization of the
sol8ar radio emission at frequencies 204
and 74 MHz have been made.
An information obtained, i.e.
the data bank, is kept as records of an
analog
signal at a paper tape (the flux density, the polarization) or film
(dynamic radio spectra).
The main part of data has been
preliminary analyzed. By this analysis
tables
of observations have been
compile, the format of the tables mainly
coincide with the format of data being published at
"Solar - Geophysical
Data" bulletin. In the
tables averaged over a day flux densities of the
radio
emission at fixed frequencies, their mean variability are contained.
A
times of the beginning, the
maximum, and the end of events are included
in
data about outstanding events
(manifestations of the solar activity at
the
form of radio
bursts) with the
value or the ball of the maximum
intensity of events and their
morphological characteristics.
The main part of this tables have
been publishing at bulletins "Solar
-
Geophysical Data", "Solnechnye dannye" and
"Quarterly Bull. on Solar
Activity". The
data of the observations of the
radio emission of the Sun
are widely known and are used at
investigation of scientists in our country
and abroad.
The relational database "LARSBASE" has been
forming with dBase IV in
1993.
It is kept at a disk memory. The database being expanded by adding
data of last years observations.
An access to
the database are
performed with the special program
independent from dBase IV. An essential part of data may be outputted to a
printer or to a text file. By agreement
the data of IZMIRAN observations of
the
solar radio emission
may be submitted by E-mail
for scientific
investigations.
142092, Moscow Region, Troitsk, IZMIRAN,
Solar Radio Laboratory
(095)-334-09-02
E-mail: agnezdil@izmiran.rssi.ru
Bank of data of observations of the radio emission of the Sun
at IZMIRAN
........................................................................…………………………
. Observed Observed
parameter The
beginning The end
.frequency ...............................………………………………………..
.
range Flux Degree of dynamic of observation
.
MHz density polarization spectra month, year
.........................................................................…………………………
.
3000 +
Oct. 67 Today
.
545 +
Jun. 57 Aug. 60
.
545 + Jan. 61 Mar. 62
.
204 +
Jan. 56 Today
.
204 + + Aug. 68 Sep. 73
.
169 + Jan. 84
.
74 + + Jun. 72 Jul. 81
. 230 - 180 + Nov. 68 Today
. 190 - 90
+
May 73 Today
. 280 - 170 + Mar. 87
.
90 - 45 + Jan. 61 Today
.........................................................................…………………………
Database of observations of the radio emission of the Sun at IZMIRAN
LARSBASE
........................................………………
.
Frequency Data at
.
range the dBase IV
system
. and the SGD format
.
MHz the beginning -
today
........................................………………
.
3000 Jan.90 -
today
.
204 Jan.90 -
today
. 270 -
45 Jan.90 - today
........................................………………