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Topic: Footprint (satellite)

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	Satellite TV Service - Digital Satellite TV Dish
		Drawbacks of Satellite TV A clear line of sight from a dish antenna to the southern sky is necessary to receive a direct signal from the satellite.Heavy rain,snow,trees and tall buildings could also causes to lose signal strength due to the dish antenna not being able to see the satellite.
		Satellite are very expensive to launch, and the broadcast coverage may be as large as an entire hemisphere, but satellites more typically broadcast to a smaller area (footprint), such as a country or group of countries.
		TV transmission satellites operate on internationally agreed-upon frequencies in two-bands the C band, 3.4 to 6.425 GHz, and the Ku band, 10.95 to 14.5 GHz.
	www.satellitetvref.com (1292 words)

	Satellite phone
		The footprint of a satellite is the geographic region on the surface of the Earth within the range of signals of the satellite.
		In cellular satellite phone communications systems and methods, multiple beams are provided, each of which can serve distinct geographical areas in the overall service region, to collectively serve an overall satellite footprint.
		A satellite phone generally comprises a handheld device together with an antenna which may be connected to the telephone via a suitable connection and which may be deployed in a position on the ground or other suitable structure for directing into the sky.
	www.electronics-manufacturers.com /info/satellite-communications/satellite-phone.html (950 words)

	Bell Expressvu - Canadian Digital Satellite - Expressvu - Nimiq
		Bell Expressvu is currently Canada's leading digital direct to home (DBS) satellite provider, delivering over 300 channels of Canadian English and French television programming from coast to coast in Canada to over 1.8 million subscribers via a small 18" digital satellite dish and set top box.
		In December 2002, Canada's second DBS class satellite, Nimiq 2 was launched, achieving a final orbital location at 82° W.L. This allowed Expressvu to further expand their programming lineup.
		In 2004, Bell Expressvu acquired use of an older Directv DBS class satellite, which was re-named Nimiq 3 and relocated to the 91° orbital location, to operate with Nimiq 1.
	satellitetv.digitalinsurrection.com /bell_expressvu.php (1606 words)

	All About Satellite (Site not responding. Last check: )
		Also, when a satellite needs to be replaced (the average lifetime of a satellite is about 15 years) the replacement satellite can be put in the same position, so that when the first one 'dies' and falls back to earth, the next one is already in place and continues to broadcast the same stations.
		Footprint diagrams show the area of coverage, including the antenna size which is needed for good reception in the central and outlying areas.
		In addition to a satellite tuner, one may also need an additional antenna positioner (in case of a polar mount dish), a descrambler box and a smart card reader in order to receive encoded transmissions, all of which can be built into the satellite tuner.
	www.satellitedish.com /about.htm (3304 words)

	Systems and methods for monitoring terrestrially reused satellite frequencies to reduce potential interference - ...
		A satellite radiotelephone system according to claim 1 wherein the monitor is further configured to monitor wireless radiation by the plurality of first radiotelephones at the space-based component and wherein the controller is further configured to adjust the radiation by the plurality of first radiotelephones in response to the monitor.
		A satellite radiotelephone system according to claim 1 wherein the monitor is configured to monitor wireless radiation by the ancillary terrestrial network and/or the plurality of second radiotelephones of the at least some of the satellite radiotelephone frequency band that is terrestrially reused by the ancillary terrestrial network and/or the plurality of second radiotelephones.
		A satellite radiotelephone system according to claim 1 wherein the monitor is configured to monitor wireless radiation by the ancillary terrestrial network and/or the plurality of second radiotelephones over all of the satellite footprint and all of the satellite radiotelephone frequency band.
	www.freepatentsonline.com /7039400.html (14727 words)

	VSAT Training - Basics on Satellite Internet
		Knowing that a satellite in orbit transmits on a vertical or horizontal polarity, then it should come as no surprise that you will need to rotate (or SKEW) the radio assembly so that you be aligning the dish electronics to be perfectly in line with the orbiting satellite signals.
		Satellite communications are radio transmission in the KU Band of the electromagnetic spectrum.
		The footprint of a satellite shows the location that a satellite dish may be located to communicate with the satellite.
	www.groundcontrol.com /galileo/ch1-sat-int-basics2.htm (574 words)

	footprint - Shopping.com
		This footprint from The North Face acts as a protective barrier between your Vector 22 tent and the ground surface, prolonging the life of the floor.
		The Meridian 1 Footprint from Mountain Hardwear puts a waterproof layer between the floor of your tent and the ground to prevent damage from sharp roc...
		The PCT 1 Footprint from Mountain Hardwear puts a waterproof layer between the floor of your tent and the ground to prevent damage from sharp rocks, s...
	www.shopping.com /xCC-footprint-store_mountain_gear (1025 words)

	SingTel.com - Network & Infrastructure // Satellite Systems
		Satellite systems play a major role in providing diversity for cable circuits, as well as providing direct connection to countries which are otherwise not accessible by submarine cable.
		The ST-1 satellite, co-owned with Chunghwa Telecom of Taiwan, is one of the most powerful satellites in the region with a footprint covering most of Asia up to the borders of Russia.
		The Optus D1 satellite is the 7th satellite in the Optus Satellite fleet to be successfully placed in orbit.
	home.singtel.com /about_singtel/network_n_infrastructure/satellite_systems/networkinfra_satellitesystems.asp (733 words)

	Television: Satellite Reception (Site not responding. Last check: )
		The quality of satellite reception can be much better than the quality of the cable signal, provided one uses a good dish antenna plus corresponding reception installation.
		Satellite TV is generally less expensive per month than cable TV.
		Customer satisfaction/support is rated higher with Satellite than with cable TV according to surveys by JD Power year after year.
	columbiaisa.freespaces.com /tv_sat_reception.htm (3051 words)

	Satellite Phone
		The phone call is transferred from cell to cell and from satellite to satellite as the spacecraft rise and set during their orbital motion (approximately one revolution around the earth per hour).
		Each satellite has its antennas and electronics tuned for optimum coverage of a particular area on Earth, known as its footprint.The tremendous advantage of the Inmarsat-3 satellites is their ability to concentrate power on particular areas of high traffic within the footprint.
		The satellite cell sites, instead of being linked to each other and to a master control center by means of land telephone lines, use three Ka-band communications links, one for inter-satellite communications, a second for down-linking to the ground-earth station and a third for up-linking to the GES.
	www.highspeedsat.com /satellite-phone-how.htm (8907 words)

	FCC Satellite Learning Center
		Unlike a passive satellite such as the moon or the early ECHO satellite, a modern communications satellite receives the radio signal and sends it back down to Earth stronger than it was received.
		The "footprint" of a satellite is the area of the Earth that is covered by a satellite's signal.
		Some satellites are able to shape their footprints so that only certain areas are served.
	www.fcc.gov /cgb/kidszone/satellite/kidz/how_sats_work.html (500 words)

	Satellite footprint generator (Site not responding. Last check: )
		This satellite footprint generator is no longer maintained, and has been retired.
		Chris Meenan's footprint generator was an online web common-gateway-interface application demonstrating some of the functionality of the SPOC (Satellite Positioning and Orbital Control) software developed at the Centre for Communication Systems Research.
		Some sample generated footprint plots from the footprint generator are still available.
	www.ee.surrey.ac.uk /Personal/L.Wood/about-footprint (129 words)

	A yearlong comparison of plot-scale and satellite footprint-scale 19 and 37 GHz brightness of the Alaskan North Slope
		Subpixel heterogeneity remains a key issue in the estimation of land parameters using satellite passive microwave sensors; the scales of spatial variability on land are typically much smaller than sensor footprints (tens of km).
		This paper quantifies the similarity between ground-based brightness and satellite brightness observations at 19 and 37 GHz for Arctic tundra on the North Slope of Alaska, identifying and quantifying sources of the differences.
		Footprint sizes were 2 × 4 m for the tower-based observations and 43 × 69 km for the resampled SSM/I observations.
	www.agu.org /pubs/crossref/2003/2002JD002393.shtml (421 words)

	Satellite : Software: Satellite tracking
		Satellite Finder - Satellite Finder is a way to accurately point satellite dishes at communications satellites in geostationary orbit.
		Satellite tracking with GPS - The program calculates the actual position of the satellites using the NORAD 2LINE-element set, which is available via the Internet, for nearly all satellites.
		There are about 8000+ satellites in orbit, a lot of these are just junk and debris such as discarded rocket bodies, but quite a few are working Satellites.
	www.dxzone.com /catalog/Software/Satellite_tracking (1885 words)

	The Satellite's the Limit - Space - RedOrbit (Site not responding. Last check: )
		Once Measat-3 was placed in geostationary orbit, its array of communications equipment, including the six reflectors used to create the satellite's "footprint" over the earth and solar panels used to generate electrical power in orbit, was ready for deployment.
		The solar arrays of the fully-deployed satellite were then oriented towards the sun's rays, a procedure called "sun acquisition".
		"As the new satellite can interfere with the transmissions from the existing Measat-1 satellite, located 0.5 degrees away in the orbital arc, the IOT is performed in co-ordination with Measat's clients to ensure that there is minimal disruption to their customers.
	www.redorbit.com /news/space/786613/the_satellites_the_limit/index.html?source=r_space (767 words)

	Geo-Orbit Quick-Look - International Regional Satellite Dish Size Based on Footprint Coverage Maps; AZ/EL Calculation ...
		Footprints are detailed and may not load as quickly as you would like.
		a real nice program; use it before you buy your equipment to assure you can see the satellites you really want and use this program after you tune your dish to see if the sparkles you have are the sparkles you should get.
		Links to footprints, specs, programming are checked; orbit positions and inclination are as current as our sources allow; a very few links to press references are still in limbo.
	www.geo-orbit.org /sizepgs/sizemainp.html (1078 words)

	PREDICTING OUT OF FOOTPRINT COVERAGE
		A question asked of the satellite professional very frequently is how big an antenna is required to receive a particular satellite or satellite service.
		Depending on the downlink configuration of the individual satellite, the receive earth station is dependent on the amount of signal generated throughout the footprint.
		So if certain satellites transponders appear to be weaker than others the chances are that the operator is not using the total power of the transponder and depending on the bandwidth allocated to a specific service the reception dish sizes could vary dramatically.
	www.apsattv.com /techinfo/predicting-out-of-footprint-coverage.htm (3068 words)

	KVH Satellite Footprint Maps - TracVision
		The following satellite footprint information is intended as a general reference only.
		Each footprint map indicates coverage areas based on EIRP (Effective Isotropic Radiated Power), a value representing the satellite signal strength in those areas.
		Note: If the satellite you wish to receive is not already installed in your system's satellite library, you can install it manually.
	www.kvh.com /footprint/footprint_tv.asp (364 words)

	PanAmSat Agreement
		On behalf of the PRSS, NPR will lease three C-band transponders on PanAmSat's Galaxy IVR satellite, which is scheduled for launch in the first half of 2000, with an option to acquire Ku-band capacity on an as-needed basis.
		Public radio's service will remain on the Galaxy VI satellite (at 99 degrees W.L.) until the first quarter of 2000, when an interim transition will be made to the Galaxy XI satellite (to be placed in the same orbital position) after it is launched.
		The PRSS, which was the first national radio system to utilize satellite technology, has been managed by NPR since its inception in 1979.
	www.npr.org /about/press/991216.panamsat.html (605 words)

	Tech Museum \| Satellites \| Communications (Site not responding. Last check: )
		That means that the satellite always stays over one spot on Earth.
		The area on Earth that it can "see" is called the satellite's "footprint." Here is one footprint that covers all of Africa.
		We can also use satellites as a relay system to send signals anywhere on Earth.
	www.thetech.org /exhibits_events/online/satellite/3/3a/3a.html (168 words)

	Lloyd's satellite constellations - Overview - Globalstar
		The failure to launch twelve satellites on a Zenit-2 in September 1998 was reduced from streaming video to a single line in their now-vanished launch schedule, although a press release concerning the launch failure was later put up.
		Globalstar coverage is limited to regions that lie within the same satellite footprint as a gateway station, and Globalstar associates have built far fewer gateway stations than originally planned.
		Globalstar lost twelve satellites on a Russian Zenit 2 rocket launched on Wednesday, 9 September 1998, apparently due to flight control computer problems.
	www.ee.surrey.ac.uk /Personal/L.Wood/constellations/globalstar.html (1012 words)

	Orbital Enterprises: Satellite Internet Access Anywhere
		As you approach the outer limits of your antennas performance in a particular location you will notice that at night you will stay connected fine but as soon as 10AM to about 6 PM roll around you will get disconnected because your signal will not be strong enough to over come the background solar noise.
		This is the GE-4 satellite footprint that StarBand also uses.
		This satellite is not currently being used for the Nova service but is still available for the older 48x service.
	www.orbitalenterprises.net /links.html (929 words)

	Sirius and XM Radio Satellite Service Coverage Map and Orbit Information
		Because of the wide orbit of the satellites, the uplink signal can't reach the southernmost satellite at any particular time (this also means only two of the satellites are broadcasting any any particular time).
		Sirius has a fourth satellite on the ground now as a backup in case one of the three in the sky suffers a catastrophic failure, so the next satellite would technically be the fifth.
		The fourth satellite is also planned to be geostationary, as opposed to the orbiting ones currently in the sky.
	www.dogstarradios.com /sirasasecoma.html (1440 words)

	Satellite Communications General Information
		Satellite Communications Database: Access to profiles of many of the satellite communications systems which are being launched over the next few years to provide voice and data services in different regions of the world, from Analysys Consulting
		Satellite Footprint Projector: This is a very simple satellite footprint generator by Chris Meenan, where you can plot the footprints of various satellites, including proposed constellations
		These statistics, in conjunction with satellite system parameters and accepted atmospheric attenuation models, are used to produce a measure of total path loss.
	www.isr.umd.edu /~michalis/satellite/General2.html (702 words)

	NOAASIS - NOAA Satellite Information System for NOAA Meteorological / Weather Satellites
		With a geostationary orbit, any location within the satellite "footprint" is able to receive nearly continuous data coverage.
		WEFAX is the retransmission of low-resolution infrared and visible satellite imagery and graphical meteorological data to low cost satellite ground receiving stations located within the footprint of geostationary satellites.
		After obtaining an agreement with the National Environmental Satellite Data and Information Service (NESDIS), the data are processed at Wallops and made available to customers either via a domestic communication satellite (DOMSAT), the NOAA GOES satellite or dial-in modem to Wallops.
	noaasis.noaa.gov /NOAASIS/ml/satservices.html (1747 words)

	Footprint Page
		This new installer allows you to install Footprint in a custom folder, add Desktop and/or Taskbar short-cut icons and features a fully functional uninstaller.
		This version of Footprint has been designed under Windows XP, and also operates under
		It is designed to fill a 1024×768 PC screen.
	myweb.tiscali.co.uk /wxsatellite/footprint.htm (63 words)

	Digital Store-and-Forward Satellite Communications
		The originating ground station sends a digitised message to the LEO satellite, the satellite stores the message in an on-board storage system, and the destination ground station later retrieves the message.
		Thus, the satellite physically carries the message from one ground station to the other, and the destination ground station is not necessarily in the satellite footprint at the same time as the originating ground station.
		The originating ground station must wait for the satellite to come into range before it can upload a message, and then the message must be stored on-board the satellite until the destination ground station comes into the footprint.
	www.ee.surrey.ac.uk /SSC/CSER/UOSAT/communications/comms.html (460 words)

	Satellite Phones, Satellite Phone Rentals - Explorer Satellite
		constellation consists of 66 operational satellites and 13 spare satellites orbiting in a constellation of six polar planes.
		The satellites are in a near-polar orbit at an altitude of 485 miles (780 km).
		satellite is cross-linked to four other satellites; two satellites in the same orbital plane and two in an adjacent plane.
	www.explorersatellite.com /satellite_phones.htm (588 words)

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