Views of the U.S. NAS and NAE on Agenda Items at the World Radiocommunication Conference 2015 (2013) / Chapter Skim
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1 Introduction
1 Introduction
Pages 1-8
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Since the vast majority of spectrum allocations are for the active use of the spectrum, it is NOTE: Portions of this text are taken from National Research Council, Views of the NAS and NAE on Agenda Items at Issue at the World Radiocommunication Conference 2012, The National Academies Press, 2013.
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provide scientific observations of the universe and Earth through the use of advanced receiver technology with extreme sensitivity and complex noise reduction algorithms. Even with such technology, RAS and EESS are seriously adversely affected by what most active services would consider extremely low noise levels.2 Earth Exploration-Satellite Service Satellite remote sensing is a uniquely valuable resource for monitoring the global atmosphere, land, and oceans.
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It was through the use of radio astronomy that scientists discovered the first planets outside the solar system, circling a distant pulsar. Subsequent observations of pulsars have revolutionized our understanding of the physics of neutron stars 3 Active remote sensing involves sending a signal, receiving the reflected signals, and analyzing them.
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Measurements of radio spectral line emission have identified and characterized the birth sites of stars in the galaxy, the processes by which stars slowly die, and the complex distribution and evolution of galaxies in the universe. Radio astronomy measurements have discovered the cosmic microwave background (CMB)
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Observations of supernovas have allowed astronomers to witness the distribution of heavy elements essential to the formation of planets like Earth, and of life itself. Spectrum Sharing and the Scientific Services The critical science undertaken by Earth remote sensing scientists and radio astronomers cannot be performed without access to interference-free spectrum.
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This report identifies the agenda items of relevance to and potentially impacting U.S. radio astronomy and Earth remote sensing observations.
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, subject to appropriate sharing conditions; 1.9.2 The possibility of allocating the bands 7 375-7 750 MHz and 8 025 8 400 MHz to the maritime-mobile satellite service and additional regulatory measures, depending on the results of appropriate studies; 1.10 To consider spectrum requirements and possible additional spectrum allocations for the mobile-satellite service in the Earth-to-space and space-to-Earth directions, including the satellite component for broadband applications, including International Mobile Telecommunications (IMT) , within the frequency range from 22 GHz to 26 GHz, in accordance with Resolution 234 (WRC-12)
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; 1.18 To consider a primary allocation to the radiolocation service for automotive applications in the 77.5-78.0 GHz frequency band in accordance with Resolution 654 (WRC-12) ; 2 To examine the revised ITU-R Recommendations incorporated by reference in the Radio Regulations communicated by the Radiocommunication Assembly, in accordance with Resolution 28 (Rev.WRC-03)
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