Category:Communications satellites

Category:Communications satellites - Factbites
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Topic: Category:Communications satellites

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In the News (Thu 24 Dec 09)

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	COM DEV International - 1997 Releases
		Two years later he became the manager of the Satellite Transponder Department which was responsible for designing the payloads used in the Canada/USA Communications Technology Satellite (Hermes) and the first USA Domestic Satellites (RCA Satcom).
		Emigrating to Canada in 1963, he joined the Communications Division of RCA in Montreal where he participated in the engineering development of the first generation of satellite earth stations.
		In 1969 he transferred to the Space Systems Division and led the team developing the technology required for advanced microwave payloads for communication satellites.
	www.comdev.ca /pressrel/1997/970529.html

	Master List of Names, Acronyms, Initialisms, and Abbreviations for Un-Manned Satellites
		Each satellite name is associated with a discipline/category which links to the page where the satellite (or satellites in that series) is (are) found.
		Individual satellites or satellite series are linked to satellite-specific pages when available.
		Satellites can be located by either name or acronym:
	www.cira.colostate.edu /ramm/hillger/acronyms.htm

	Mobile satellite communications system with local and global network
		The mobile terminals are divided into first and second categories, the store retaining corresponding different status information and both the first and second categories communicating with the satellites.
		Since the satellites 4 are travelling in known orbits and the positions of the earth stations 6 are predetermined, the processor 58 is capable of calculating what the shortest mobile-satellite link and the shortest mobile-satellite-earth station link will be, for any given mobile user equipment position at any time of day.
		A system according to claim 1, further comprising a device (58) for altering the category of a mobile terminal (2), and for changing the status information held in the store (54) correspondingly.
	gauss.bacon.su.se /EP/7/9/EP792543.html

	HI-TECH WEAPONS TODAY-4 SIGNALS & SINO-US INFO 'WAR'
		They are able to get closer to intelligence targets than satellites or land stations, positioning themselves in what one signals intelligence expert calls the antenna alleys and side-lobes of adversary systems that is, the areas where microwave and other signals traverse the air and might be able to be intercepted.
		In fact, information warfare, or IW, is part of a larger category the military calls full spectrum information operations, which combines old-fashioned psychological, electronic and covert warfare techniques.
		The dial tone, an inherent part of all such computer communications, is known as Proforma, and it can be used to manipulate, deceive and disable the sophisticated computers that modern military forces now rely upon.
	quicksitebuilder.cnet.com /joyban/id28.html

	Dilution of precision (GPS) - - Source of Knowledge Free Web-based Encyclopedia/Journals
		When visible satellites are close together in the sky, the geometry is said to be weak and the DOP value is high; when far apart, the geometry is strong and the DOP value is low.
		Note that this situation is not restricted to GPS, but occurs in electronic-counter-counter-measures (electronic warfare) when computing the location of enemy emitters (radar jammers and radio communications devices).
		Browse - Article overviews - Other category schemes
	www.source-of-knowledge.com /?t=Dilution_of_precision_(GPS)

	SPACE.com -- A major flare shot off the sun Friday July 14, pummeling Earth with the biggest solar-r radiation storm in almost six years.
		Major and moderate solar flares on July 10 and 11 caused coronal mass ejections that triggered category G3, or major geomagnetic storm conditions Thursday and again Friday.
		The barrage of protons spewing off the sun disrupted some satellites and shortwave radio communication and prompted a call to delay a Russian space launch.
		Such blackouts are typified by wide losses of shortwave communications and perhaps hour-long loss of radio contact and degradation of navigation systems for aviators and mariners.
	www.space.com /scienceastronomy/solarsystem/solar_storm_000713.html (916 words)

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Topic: Category:Communications satellites

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In the News (Thu 24 Dec 09)