Recent from talks
AISSat-1
Knowledge base stats:
Talk channels stats:
Members stats:
AISSat-1
AISSat-1 is a satellite used to receive Automatic Identification System (AIS) signals. Launched on 12 June 2010 from Satish Dhawan Space Centre as a secondary payload, AISSat-1 is in a Sun-synchronous low Earth orbit. Initially a development project, the satellite has since passed into ordinary operations. Via downlinks at Svalbard Satellite Station and at Vardø Vessel Traffic Service Centre it tracks vessels in the Norwegian Sea and Barents Sea for the Norwegian Coastal Administration, the Norwegian Coast Guard, the Norwegian Directorate of Fisheries and other public agencies.
The satellite was developed as a cooperation between the Norwegian Defence Research Establishment (NDRE), the Norwegian Space Centre and the Coastal Administration. The payload was developed by Kongsberg Seatex while the University of Toronto Institute for Aerospace Studies built the bus and completed manufacture. The satellite measures 20 centimeters (7.9 in) cube and weighs 6 kilograms (13 lb). Ownership and operation passed to Statsat in 2013. The satellite has since 2014 been supplemented with AISSat-2 and from 2015 by AISSat-3.
The Automatic Identification System was developed as a navigational aid for shipping traffic, initially primarily as a collision avoidance system. The system became mandatory most commercial ships from 2008. AIS was designed as a terrestrial system with AIS transponders operating on the very high frequency (VHF) range. In addition to ship-to-ship tracking, AIS could be monitored by a series of coastal base stations. The idea for satellite monitoring arose later and was mostly intended for maritime surveillance and control, as well as safety monitoring.
The Norwegian Defence Research Establishment took the first steps towards AIS satellite use in 2003 paper. A main concern was the low transmitting power of AIS, typically one to twelve watts. Simultaneous transmission could also result in data packet collision and thus make all transmissions unreadable. Research later concluded that satellite monitoring of heavily trafficked areas would be near impossible, but that satellite surveying of the sparsely used Arctic waters would be effective. The AIS infrastructure in Norway was built and is operated by the Norwegian Coastal Administration in cooperation with the Norwegian Armed Forces. It was this cooperation which led to the development of the satellite AIS system.
Increased focus on the High North arose following the appointment of Stoltenberg's Second Cabinet in 2005. The AISSats are part of a larger policy to strengthen Norway's grip on the Arctic areas. Norway's exclusive economic zone (EEZ) covers sea areas around Svalbard and Jan Mayen, which in addition to the continental EEZ gives it an area of 1,878,953 square kilometers (725,468 sq mi).[citation needed] Eighty percent of all Arctic shipping traffic passes through Norway's EEZ.
Specific research into what became AISSat-1 began in 2005 as a cooperation between the Norwegian Space Centre, Norwegian Defence Research Establishment and Kongsberg Seatex. The initial research concluded that a satellite within an orbit of 1,000 kilometers (620 mi) would be able to receive AIS communication. A particular challenge during this period was the need for an antenna with sufficient length to match the wavelength, which would be difficult with a small satellite profile. As part of the development, an AIS transceiver was attached to the International Space Station to test out the receptivity of AIS signals in low Earth orbit. AISSat-1 was Norway's first non-commercial satellite.
The satellite was regarded as experimental by the involved parties. Design of the payload and AIS components was carried out by Kongsberg Seatex. The project is owned by the Norwegian Space Centre while NDRE was responsible for technical aspects. Once operational, the data was fed to the Coastal Administration. Production was subcontracted to the University of Toronto Institute for Aerospace Studies (UTIAS) using their Generic Nanosatellite Bus as the satellite bus.
AISSat-1 is built around the University of Toronto's Generic Nanosatellite Bus. The satellite measures 20 centimeters (7.9 in) cubed. It is solar-powered collected by thirty-six panels and stored in two batteries. There are three onboard computers, each with an ARM7 microcontroller. One operates household issues such as telemetry while one handled attitude control. The third handles payload operations. There are four ultra high frequency antennas for telemetry. Attitude is adjusted through three reaction wheels. The payload consists of a VHF antenna and an onboard computer for storing and processing of AIS data.
Hub AI
AISSat-1 AI simulator
(@AISSat-1_simulator)
AISSat-1
AISSat-1 is a satellite used to receive Automatic Identification System (AIS) signals. Launched on 12 June 2010 from Satish Dhawan Space Centre as a secondary payload, AISSat-1 is in a Sun-synchronous low Earth orbit. Initially a development project, the satellite has since passed into ordinary operations. Via downlinks at Svalbard Satellite Station and at Vardø Vessel Traffic Service Centre it tracks vessels in the Norwegian Sea and Barents Sea for the Norwegian Coastal Administration, the Norwegian Coast Guard, the Norwegian Directorate of Fisheries and other public agencies.
The satellite was developed as a cooperation between the Norwegian Defence Research Establishment (NDRE), the Norwegian Space Centre and the Coastal Administration. The payload was developed by Kongsberg Seatex while the University of Toronto Institute for Aerospace Studies built the bus and completed manufacture. The satellite measures 20 centimeters (7.9 in) cube and weighs 6 kilograms (13 lb). Ownership and operation passed to Statsat in 2013. The satellite has since 2014 been supplemented with AISSat-2 and from 2015 by AISSat-3.
The Automatic Identification System was developed as a navigational aid for shipping traffic, initially primarily as a collision avoidance system. The system became mandatory most commercial ships from 2008. AIS was designed as a terrestrial system with AIS transponders operating on the very high frequency (VHF) range. In addition to ship-to-ship tracking, AIS could be monitored by a series of coastal base stations. The idea for satellite monitoring arose later and was mostly intended for maritime surveillance and control, as well as safety monitoring.
The Norwegian Defence Research Establishment took the first steps towards AIS satellite use in 2003 paper. A main concern was the low transmitting power of AIS, typically one to twelve watts. Simultaneous transmission could also result in data packet collision and thus make all transmissions unreadable. Research later concluded that satellite monitoring of heavily trafficked areas would be near impossible, but that satellite surveying of the sparsely used Arctic waters would be effective. The AIS infrastructure in Norway was built and is operated by the Norwegian Coastal Administration in cooperation with the Norwegian Armed Forces. It was this cooperation which led to the development of the satellite AIS system.
Increased focus on the High North arose following the appointment of Stoltenberg's Second Cabinet in 2005. The AISSats are part of a larger policy to strengthen Norway's grip on the Arctic areas. Norway's exclusive economic zone (EEZ) covers sea areas around Svalbard and Jan Mayen, which in addition to the continental EEZ gives it an area of 1,878,953 square kilometers (725,468 sq mi).[citation needed] Eighty percent of all Arctic shipping traffic passes through Norway's EEZ.
Specific research into what became AISSat-1 began in 2005 as a cooperation between the Norwegian Space Centre, Norwegian Defence Research Establishment and Kongsberg Seatex. The initial research concluded that a satellite within an orbit of 1,000 kilometers (620 mi) would be able to receive AIS communication. A particular challenge during this period was the need for an antenna with sufficient length to match the wavelength, which would be difficult with a small satellite profile. As part of the development, an AIS transceiver was attached to the International Space Station to test out the receptivity of AIS signals in low Earth orbit. AISSat-1 was Norway's first non-commercial satellite.
The satellite was regarded as experimental by the involved parties. Design of the payload and AIS components was carried out by Kongsberg Seatex. The project is owned by the Norwegian Space Centre while NDRE was responsible for technical aspects. Once operational, the data was fed to the Coastal Administration. Production was subcontracted to the University of Toronto Institute for Aerospace Studies (UTIAS) using their Generic Nanosatellite Bus as the satellite bus.
AISSat-1 is built around the University of Toronto's Generic Nanosatellite Bus. The satellite measures 20 centimeters (7.9 in) cubed. It is solar-powered collected by thirty-six panels and stored in two batteries. There are three onboard computers, each with an ARM7 microcontroller. One operates household issues such as telemetry while one handled attitude control. The third handles payload operations. There are four ultra high frequency antennas for telemetry. Attitude is adjusted through three reaction wheels. The payload consists of a VHF antenna and an onboard computer for storing and processing of AIS data.