. | . |
Satellite coverage for polar bears and penguins by Staff Writers McLean VA (SPX) May 02, 2016
Although children's books and animated films often show them frolicking together, penguins and polar bears actually occupy opposite ends of the earth. Polar bears are found in the far northern latitudes, while penguins occupy the world's southern oceans and land masses. But Intelsat General provides satellite connectivity to customers with facilities at both ends of the world, one at the northernmost inhabited place on earth, and the other right at the South Pole. The northern outpost is an Arctic research facility and a weather and radio monitoring station operated in the province of Nunavut, on the northeastern tip of Ellesmere Island. The location is directly north of Greenland and about 500 miles south of the geographic North Pole, closer to Moscow than to Ottawa. About 75 government personnel and civilian contractors work at the station year round in a maze of connected buildings, surrounded from mid-October to the end of February in perpetual darkness and an average annual temperature of 17 degrees below zero. And yes, there are polar bears. Maintaining morale is vital to operation of the station, so the personnel posted there have amenities such as a tanning salon, gymnasiums, live television broadcasts and recreational facilities to pass their leisure time. The facility is regularly resupplied by plane from a U.S. Air Force base in Thule, Greenland. Data generated by the station's activities as well as daily video phone calls home for station personnel travels via a six-station UHF repeater chain to a small weather station at Eureka on Ellesmere Island and then via Intelsat's Galaxy C3 satellite to ground stations in Canada. Kevin Debruycker, IGC's Customer Solutions Engineer helped implement this unique network which required a data link between the customer's remote location and their hub in Ottawa. Due to the extreme low look angle the only suitable satellite was the Intelsat G-3C at 95.05 degrees west. The combination of low look angle and extreme temperature and atmospheric conditions required a two-antenna solution utilizing a "bouncing" technique for transmitting and receiving carriers. The two co-located antennas are vertically separated so that depending on the time of day, one or the other antenna can more effectively "bounce" the signal off the ground to the satellite. At the bottom of the world closer to the penguins, Intelsat General provides satellite connectivity to a research facility operated by the National Science Foundation at the Amundsen-Scott South Pole Station. The population at the station ranges from around 50 in the dark winter months to over 150 scientists and support staff in the brighter summer months. The service originally went through Intelsat's Marisat-F2 spacecraft, but after retirement of that satellite, service shifted to Airbus' Nato IVB satellite using the X-band. The communications signals go through the Oakhanger ground station southwest of London and then tie into the IntelsatONE fiber network for worldwide delivery of scientific data to colleagues at universities, phones calls home, video conferencing, software updates, and emergency telemedicine. The station at the South Pole uses a weather-hardened X-Band SATCOM terminal. Because of its location on the southern-most point of the Earth, satellite dishes at the Amundsen-Scott station are out of view of geo-stationary communications satellites orbiting the equator. However, the 20-year-old Skynet-4C satellite is in an inclined orbit and drifts slightly above and below the equatorial plane as it orbits the Earth. With its inclination now at 10.3 degrees, the satellite is visible to the South Pole for about five hours each day. The daily visibility will grow as the satellite ages and the inclination increases. The research at the South Pole is very "data-intensive," with more than 100 gigabytes of astronomical, climate and other data being sent by satellite on some days. In addition, the satellites are used for Internet access, e-mail and routine communications with scientists around the world interested in the South Pole research. So even though penguins never see a polar bear, Intelsat General's customers share the burden of freezing climates, months of darkness, and vital responsibilities at opposite ends of the earth.
Related Links Intelsat General Earth Observation News - Suppiliers, Technology and Application
|
|
The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us. |