A description published by the Air Force calls the constellation the backbone of the U.S. militarys satellite communications adding the satellites themselves are its highest capacity communications satellites.. The IWS System supports continuous 24-hour-per-day wideband satellite services to tactical users and some fixed infrastructure users. Select a Satellite To Point to. Large swatches of America have little or no coverage. Satellite coverage spans great distances A satellite can directly connect points separated by 1000's of miles A satellite can broadcast to 1000's of . The constellation of WGS satellites increases the communications capabilities of the militaries of the United States, Canada, and Australia by providing additional bandwidth and communications capabilities for tactical command and control, communications, and computers; intelligence, surveillance, and reconnaissance (C4ISR); battle management; and combat support information. The WGS system is composed of three principal segments: Space Segment (satellites), Control Segment (operators) and Terminal Segment (users). Capacity: WGS will offer 4.875 GHz of instantaneous switchable bandwidth. Although ion thrusters deliver a very low thrust, they are extremely efficient and consume only a very small amount of propellant. CONNA - North America AMSAT - North & South America OCSAT - Asia Pacific EMSAT - Europe and Africa IOSAT - India, CIS, Middle-East The Gapfiller System supports continuous 24 hour per day wideband satellite services to tactical users and some fixed infrastructure users. Follow the company to be always up to date with this company. #ga-ad {display: none;} WGS-7 and WGS-8 were launched in July 2015 and December 2016 respectively. WGS will offer 4.875GHz of instantaneous switchable bandwidth, thus each WGS can supply more than 10 times the capacity of a DSCS III Service Life Enhancement Program (SLEP) satellite. The WGS-2 satellite, which was designated as USA-204, entered service in August 2009. The WGS-1 satellite operates over the Pacific region. Coverage may vary. Boeing conducted a ground test for a Ka-band SATCOM antenna system for installation in the spacecraft in January 2011. The controlsegment is comprised of theDelta 8 squadrons and globallyplace resources to plan,manage, and control the WGSconstellation. Users include the Australian Defence Force and U.S. Army ground mobile terminals, U.S. Navy ships and submarines, national command authorities for the nuclear forces, and various national security/allied national forces. The final contract for this satellite was awarded in September 2011, together with long lead items for WGS8 and an option for WGS9. Live World Map of Satellite Positions - In-The-Sky.org Live Map of Satellite Positions by Dominic Ford World map Satellites above your horizon 3D globe Planetarium view Search overhead passes Date Time : Time slider Showing Time -- Freeze motion Show labels Show tracks Search Color satellites by Selection Showing -- spacecraft. On this Wikipedia the language links are at the top of the page across from the article title. Beginning in 1998, GBS broadcasts via communication payloads on two UFO Ka-Band augmented satellites. map shows the quantized color-coded availability from each satellite's field of view based on the optimized data rate for the reference link which operates in a relatively benign propagation environment. Payload commanding and network control are managed by the army's 53rd Signal Battalion at Peterson AFB, Colorado, with subordinate elements at seven locations. Hover over the logos to learn more about the companies who made this project possible. The engine provides a specific impulse of 312s, has a thrust to weight ratio of 13.7 and operates at a chamber pressure of 6.9 bar. Each WGS satellite has a launch mass of around 5,987 Kilograms and is based on Boeings BSS-702HP satellite platform. Boeing received in July 2012 an contract to install upgraded digital channelizers, which will boost capacity on the satellites by 30percent, aboard the eighth and ninth WGS satellites. WGS 5 extended the Wideband Global SATCOM constellation to the Americas for a host of users following launch in May 2013. [1] The system is composed of the Space Segment satellites, the Terminal Segment users and the Control Segment operators.[2]. Required power varies between 1,300 and 4,500 Watts achieving a thrust of up to 165 Millinewtons and a specific impulse of 3,500 seconds. Actual coverage may vary because of gateway deployment, local licensing and other factors. Credit: Boeing. The Option for WGS4 and 5 was exercised in November 2006. The spacesegment is a constellationof geo-synchronous militarycommunications satellitesthat leverage cost-effectiveproduction methods to deliverhigh throughput Ka- andX-band Services. The space segment refers to satellites in orbit; WGS-1 was launched into orbit on 10 October 2007 on the United Launch Alliance (ULA) Atlas V launch vehicle. The XIPS-25 system used by the 702SP spacecraft consists of a central Xenon tank and four 25-centimeter ion thrusters. Fiscal 2018 procurement funds in the amount of $300,000,000 are being obligated at the time of award. Regional rivalries and Nato tensions defining Turkeys military space ambitions, End of furlough presents dilemma for UK travel firms, New EU fuel tax can prompt funds for electric and hydrogen aircraft, says GlobalData, How Florida is harnessing the next phase of commercial space investment, Florida strengthens its position as a launch pad for Latin American success, Air France bets on leisure to meet shift in traveller sentiment, JetBlues new transatlantic venture should be successful, but risks remain, Supersonic flights could propel corporate travel to new heights, Autonomous swarms highlight the strategic value of manned-unmanned teaming. The ground segment is a critical part of the end-to-end science data return, and it includes all the ground-based elements that are used to collect and disseminate information from the satellite to the user (figure 11.1). Primary function:High-capacity military communications satellite The primary contractor for the satellites themselves is Boeing Satellite Development Center, which is building them around the Boeing 702HP satellite bus. One major upgrade provided by WGS is X-Ka-Band inter-connectivity delivered by a digital channelizer which divides the uplink bandwidth into independently routable 2.6MHz subchannels which can be converted from Ka-to-X-Band and vice versa. To take advantage of WGS' increased capabilities, STAR-T was upgraded by adding a fourth band (Ka), making it a quad-band terminal. London (51.51N; 0.13W), Dominic WGS-4 (USA-233), the first satellite of the Block II, was launched by United Launch Alliance (ULA) from SLC-37B at the Cape Canaveral Air Force Station (CCAFS) by a Delta IV M+ (5,4) on 20 January 2012, at 00:38:00 UTC. WGS6 was ordered in 2007 by Australia, which will get access to the WGS system in return. A statement said WGS-11+ will have more communications flexibility than the entire existing WGS constellationreferring to the new satellites numerous coverage beamswith twice the mission capability in contested environments.. The new satellite is destined to join a constellation of 10 other WGS satellites in high geosynchronous Earth orbits providing communications to deployed forces. WGS1 parameters have been measured for the Narrow Coverage Antenna (NCA) and Area Coverage Antenna (ACA) beams. The satellite will be produced at the companys El Segundo factory and is scheduled to be delivered in 2024. The WGS satellites were built on a Boeing 702 spacecraft with 13kW of power and flexible coverage areas. The satellites launched into orbit are controlled through four army wideband satellite operations centres (WSOCs) on the ground, using ground equipment hardware and software developed by Boeing, ITT Industries and Raytheon. The b parameter is often rounded to . Satellite Coverage Maps Satellite Frequencies The following graphs show the coverage of each individual satellite. The WGS Fleet is controlled by four Army Wideband Satellite Operation Centers that receive telemetry and send commands to up to three satellites per center. Gapfiller provides an increase in access for both transportable/mobile and fixed users. Phase I supported a continental United States (CONUS) testbed. WGS combines a chemical propulsion system in use for the initial climb to Geostationary Orbit with an electrical propulsion system to fulfill stationkeeping tasks and extend the satellites lifetime beyond that of pure liquid-fueled spacecraft. [14], On 23 August 2010, Boeing was awarded an Air Force contract worth US$182 million to begin work on the seventh WGS satellite. Operation and usage of the system is broken into 3 segments. The US Air Force subsequently exercised its option for two more satellites, WGS-8 and WGS-9, under a $673m contract in January 2012. Two of the four thrusters are used as primary units at any given time and stationkeeping in Geostationary Orbit will require four burns for a total of about 30 minutes per day to maintain the satellite within a 0.01 degree stationkeeping zone which allows many satellites to be collocated in a single orbital slot. Get your daily fix of Air Force news delivered right to your inbox every day. Launches It's like going from dial-up . WGS provides worldwide, flexible, high-capacity communications for US Government Agencies, Department of Defense (DOD), multiple International Partners and the North Atlantic Treaty Organization (NATO). These characteristics provide a quantum leap in communications capacity, connectivity and flexibility for U.S. military forces and international partners while seamlessly integrating with current and future X- and Ka-band terminals. First launch is projected for 2QFY05 with the second and third These characteristics provide a quantum leap in communications capacity, connectivity and flexibility for U.S. military forces and. Please make a donation to support Gunter's Space Page. These satellites have a much smaller coverage fraction f than does GPS, typically limited by a sensor's field of view. WGS was initiated to deliver newer and greater capabilities to the warfighter by deploying a constellation of high-throughput satellites to Geostationary Orbit. The WGS payload. As of the latest revision, the WGS 84 datum surface is a pole-flattened ( oblate) spheroid, with major ( transverse) radius a = 6,378,137 m at the equator, and minor ( conjugate) radius b = 6,356,752.314 245 m at the poles (a flattening of 21.384 685 755 km, or 1/298.257 223 563 0.335% in relative terms).

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