The Formation of the Dish System of the Space Radio Telescope Antenna

2019 ◽  
pp. 103-115
Author(s):  
Andrey E. Gorodetskiy ◽  
Vugar G. Kurbanov ◽  
Irina L. Tarasova
Keyword(s):  
Radio Telescope ◽  
Space Radio Telescope

scholarly journals Probing the ionosphere by the pulsar B0950+08 with help of RadioAstron ground-space baselines

2019 ◽  
Vol 491 (4) ◽  
pp. 5843-5851
Author(s):  
Vladimir I Zhuravlev ◽  
Yu I Yermolaev ◽  
A S Andrianov
Keyword(s):  
Geomagnetic Storm ◽  
Radio Telescope ◽  
Preliminary Analysis ◽  
Very Long Baseline Interferometry ◽  
Electron Content ◽  
Ionospheric Disturbances ◽  
Total Electron ◽  
Space Radio Telescope ◽  
Long Baseline ◽  
Ionospheric Total Electron Content

ABSTRACT The ionospheric scattering of pulses emitted by PSR B0950+08 is measured using the 10-mRadioAstron Space Radio Telescope, the 300-m Arecibo Radio Telescope, and the 14 x 25-m Westerbork Synthesis Radio Telescope (WSRT) at a frequency band between 316 and 332 MHz. We analyse this phenomenon based on a simulated model of the phase difference obtained between antennas that are widely separated by nearly 25 Earth diameters. We present a technique for processing and analysing the ionospheric total electron content (TEC) at the ground stations of the ground-space interferometer. This technique allows us to derive almost synchronous half-hour structures of the TEC in the ionosphere at an intercontinental distance between the Arecibo and WSRT stations. We find that the amplitude values of the detected structures are approximately twice as large as the values for the TEC derived in the international reference ionosphere (IRI) project. Furthermore, the values of the TEC outside these structures are almost the same as the corresponding values found by the IRI. According to a preliminary analysis, the detected structures were observed during a geomagnetic storm with a minimum Dst index of ∼75 nT generated by interplanetary disturbances, and may be due to the influence of interplanetary and magnetospheric phenomena on ionospheric disturbances. We show that the Space Very Long Baseline Interferometry provides us with new opportunities to study the TEC, and we demonstrate the capabilities of this instrument to research the ionosphere.

scholarly journals Space-VLBI observations of OH masers

2002 ◽  
Vol 206 ◽  
pp. 105-111 ◽  
Author(s):  
Vyacheslav I. Slysh ◽  
Maxim A. Voronkov ◽  
Irina E. Val'tts ◽  
Victor Migenes ◽  
K.M. Shibata ◽  
...  
Keyword(s):  
Brightness Temperature ◽  
Lower Limit ◽  
Radio Telescope ◽  
Angular Resolution ◽  
Main Line ◽  
Radio Telescopes ◽  
Space Radio Telescope ◽  
Vlbi Observations ◽  
Interstellar Scattering

We report on the first space-VLBI observations of the OH masers in two main-line OH transitions at 1665 and 1667 MHz. The observations involved the space radio telescope on board the Japanese satellite HALCA and an array of ground radio telescopes. The maps of the maser region and images of individual maser spots were produced with an angular resolution of 1 mas, which is several times higher than the angular resolution available on the ground. The maser spots were only partly resolved and a lower limit to the brightness temperature 6 × 1012 K was obtained. The masers seem to be located in the direction of low interstellar scattering.

scholarly journals Measurements of Antenna Surface for Millimeter-Wave Space Radio Telescope

2011 ◽  
Vol 63 (3) ◽  
pp. 475-480 ◽  
Author(s):  
Kazuhisa Kamegai ◽  
Masato Tsuboi ◽  
Akihiro Doi ◽  
Eiichi Sato
Keyword(s):  
Millimeter Wave ◽  
Radio Telescope ◽  
Space Radio Telescope ◽  
Wave Space ◽  
Antenna Surface

Monitoring and control of onboard scientific equipment of the space radio telescope

2015 ◽  
Vol 53 (3) ◽  
pp. 186-192
Author(s):  
M. S. Burgin ◽  
P. A. Voytsik ◽  
A. M. Kutkin ◽  
M. M. Lisakov ◽  
E. N. Mironova ◽  
...  
Keyword(s):  
Radio Telescope ◽  
Monitoring And Control ◽  
Space Radio Telescope ◽  
Scientific Equipment ◽  
And Control

System of maintaining the thermal regime of a space radio telescope

2014 ◽  
Vol 52 (5) ◽  
pp. 386-390 ◽  
Author(s):  
D. V. Tulin ◽  
I. S. Vinogradov ◽  
A. F. Shabarchin ◽  
A. S. Privezentsev ◽  
K. A. Goncharov
Keyword(s):  
Radio Telescope ◽  
Thermal Regime ◽  
Space Radio Telescope

scholarly journals Vlbi research in the ”Radioastron” project: structure of the H2O maser in NGC 2071 IRS 1

2021 ◽  
Author(s):  
M. A. Shchurov ◽  
◽  
I. E. Valtts ◽  
N. N. Shakhvorostova ◽  
◽  
...  
Keyword(s):  
Spatial Structure ◽  
Observational Data ◽  
Radio Telescope ◽  
Dependence Analysis ◽  
Scientific Program ◽  
Radio Telescopes ◽  
Space Radio Telescope ◽  
Visibility Function ◽  
Maser Spot ◽  
Project Structure

Within the Radioastron interferometer scientific program, observational data of the H2O maser at a frequency of 22.2280 GHz in the NGC 2071 nebula were processed. A space radio telescope (SRT — 10 m) and three radio telescopes of the ground network: RT — 32 m (Medicina, Italy), RT — 32 m (Torun, Poland) and RT —64 m (Kalyazin, RF) took part in the observations. A map of the maser spot distribution has been obtained, where there are 13 spatial components with VLSR in the range 4.7 — 20.5 km/s. Correlation is observed on ground-space baselines for the component on VLSR = 14.3 km/s. Based on the visibility function dependence analysis from the baseline projection values, there was proposed a twocomponent model of this component spatial structure with the dimensions of the extended and compact constituent of 4 and 0.06 msec, i.e. 1.56 and 0.023 au, respectively.

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