Results 21 to 30 of about 870,817 (352)
Demonstration of 100 Gbps coherent free-space optical communications at LEO tracking rates
Scientific Reports, 2022 Free-space optical communications are poised to alleviate the data-flow bottleneck experienced by spacecraft as traditional radio frequencies reach their practical limit. While enabling orders-of-magnitude gains in data rates, optical signals impose much
Shane M. Walsh +7 more
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I. S. SHKLOVSKY AND LOW-FREQUENCY RADIO ASTRONOMY
Radio Physics and Radio Astronomy, 2017 Purpose: Proving of the high astrophysical significance of the low-frequency radio astronomy (decameter and adjacent hectometer and meter wavelengths), demonstration of the priority results of the Ukrainian low-frequency radio astronomy as well as ...
A. A. Konovalenko
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The future for radio astronomy [PDF]
Astronomy & Geophysics, 2013 THE TRANSIENT UNIVERSE Rene P Breton and Tom Hassall argue that, while radio astronomy has always involved transient phenomena, exploration of this part of the electromagnetic spectrum has been falling behind because of the lack of data. But the advent of a new generation of radio telescopes such as LOFAR, could change that.
Breton, Rene +2 more
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Polygon “Simeiz-Katsively” - changes in the average pole of the Earth and the geomagnetic field over the last century [PDF]
ITM Web of Conferences, 2019 The character of changing the trajectory of the middle of the North geographical pole of the Earth's surface over the last century is studied. The peculiarities in the changes of its coordinates are established.
Volvach Larisa +3 more
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Odessa Astronomical Publications, 2017 The Pushchino Observatory of ASC LPI have been developing in some last years database of some astronomical catalogs (Radio Astronomy Data Center - RADC, look on http://astro.prao.ru/db/ and http://observations.prao.ru/).
M. A. Kitaeva +4 more
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Polygon “Simeiz-Katsively” - the cycles in the climatic and the geophysical characteristics of the Crimea [PDF]
ITM Web of Conferences, 2019 Coherent variations are established with periods of about 10–12 years and 60–70 years, which are found in processes of different physical nature and can be attributed to global cycles in the solar system, the manifestation of which in climatic and ...
Volvach Alexander +3 more
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The impact of cognitive radio on radio astronomy [PDF]
Proceedings of RFI mitigation workshop — PoS(RFI2010), 2010 The introduction of new communication techniques requires an increase in the efficiency of spectrum usage. Cognitive radio is one of the new techniques that fosters spectrum efficiency by using unoccupied frequency spectrum for communications. However, cognitive radio will increase the transmission power density and cause an increasing level of Radio ...
Albert-Jan Boonstra +2 more
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РАЗВИТИЕ РАДИОАСТРОНОМИЧЕСКОГО ЦЕНТРА ДАННЫХ (RADC) НА ПРАО АКЦ ФИАН
Odessa Astronomical Publications, 2011 The Radio Astronomy Data Center (RADC) are developed at PRAO ASC LPI in last some years. It consists from: a) the database of most important for radio astronomers astronomical catalogs; b) the database of observational data of Pushchino Radio Astronomy ...
В. А. Самодуров +7 more
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HIGH-FREQUENCY CUTOFF IN TYPE III BURSTS
Odessa Astronomical Publications, 2016 In this article we report about a group of solar bursts with high-frequency cutoff, observed on 19 August of 2012 near 8:23 UT, simultaneously by three different radio telescopes: the Ukrainian decameter radio telescope (8-33 MHz), the French Nançay ...
A. A. Stanislavsky +3 more
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THE DAILY 110 MHZ SURVEY (BSA FIAN) IN THE ON-LINE MODE: DATABASE AND PROCESSING ETHODS
Odessa Astronomical Publications, 2014 From 2012 on radio telescope BSA FIAN multi beams diagram was started. It capable at July 2014 daily observing by 96 beams in declination -8 .. 42 degrees in the frequency band 109-111.5 MHz.
V. A. Samodurov +5 more
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