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Radarsat-1 AI simulator
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Radarsat-1 AI simulator
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Radarsat-1
RADARSAT-1 was Canada's first commercial Earth observation satellite. It utilized synthetic aperture radar (SAR) to obtain images of the Earth's surface to manage natural resources and monitor global climate change. As of March 2013, the satellite was declared non-operational and is no longer collecting data.
RADARSAT-1 was launched at 14:22 UTC on 4 November 1995, from Vandenberg Air Force Base in California, into a Sun-synchronous orbit (dawn-dusk) above the Earth with an altitude of 798 km (496 mi) and inclination of 98.60°. Developed under the management of the Canadian Space Agency (CSA) in co-operation with Canadian provincial governments and the private sector, it provided images of the Earth for both scientific and marketing purposes. RADARSAT-1's images were useful in many fields, including agriculture, cartography, hydrology, forestry, oceanography, geology, ice and ocean monitoring, arctic surveillance, and detecting ocean oil slicks.
The Canadian Space Agency (CSA) RADARSAT-1 project was conceived in the early 1980s and included discussions with NASA.
NASA provided the Delta II launch vehicle to launch RADARSAT-1 and access to the NASA Deep Space Network (NASA DSN) in exchange for access to its data. Estimates are that the project, excluding launch, cost CA$620 million. The Canadian federal government contributed about CA$500 million, the four participating provinces (Québec, Ontario, Saskatchewan and British Columbia) about CA$57 million, and the private sector about CA$63 million.
RADARSAT International, Inc. (RSI), a Canadian private company, was created in 1989 to process, market and distribute RADARSAT-1 data. (RADARSAT International, Inc. (RSI) was later acquired by MacDonald Dettwiler and Associates.) In 2006, RSI was rebranded MDA Geospatial Services International or MDA GSI.
RADARSAT-1 used a synthetic aperture radar (SAR) sensor designed and built by Canadian Astronautics Limited (CAL) in Ottawa, to image the Earth at a single microwave frequency of 5.3 GHz, in the C band (wavelength of 5.6 cm). The SAR support structure was designed and manufactured by Northrop Grumman Astro Aerospace and deployed to 15 m (49 ft) in length on orbit. Unlike optical satellites that sense reflected sunlight, SAR systems transmitted microwave energy towards the surface and recorded the reflections. Thus, Radarsat-1 imaged the Earth, day or night, in any atmospheric condition, such as cloud cover, rain, snow, dust or haze.
Each of RADARSAT-1's seven beam modes offered a different image resolution. The modes included Fine, which covers an area of 50 × 50 km (31 × 31 mi) (2,500 km2 (970 sq mi)) with a resolution of 10 m (33 ft); Standard, which covered an area of 100 × 100 km (62 × 62 mi) (10,000 km2 (3,900 sq mi)) and had a resolution of 30 m (98 ft); and ScanSAR wide, which covered a 500 × 500 km (310 × 310 mi) (250,000 km2 (97,000 sq mi)) area with a resolution of 100 m (330 ft). RADARSAT-1 also had the unique ability to direct its beam at different angles.
With an orbital period of 100.70 minutes, RADARSAT-1 circled the Earth 14 times a day. The orbit path repeated every 24 days, meaning that the satellite was in exactly the same location and could take the same image (same beam mode and beam position) every 24 days. This was useful for interferometry and detecting changes at that location that took place during the 24 days. Using different beam positions, a location could also be scanned every few days.
Radarsat-1
RADARSAT-1 was Canada's first commercial Earth observation satellite. It utilized synthetic aperture radar (SAR) to obtain images of the Earth's surface to manage natural resources and monitor global climate change. As of March 2013, the satellite was declared non-operational and is no longer collecting data.
RADARSAT-1 was launched at 14:22 UTC on 4 November 1995, from Vandenberg Air Force Base in California, into a Sun-synchronous orbit (dawn-dusk) above the Earth with an altitude of 798 km (496 mi) and inclination of 98.60°. Developed under the management of the Canadian Space Agency (CSA) in co-operation with Canadian provincial governments and the private sector, it provided images of the Earth for both scientific and marketing purposes. RADARSAT-1's images were useful in many fields, including agriculture, cartography, hydrology, forestry, oceanography, geology, ice and ocean monitoring, arctic surveillance, and detecting ocean oil slicks.
The Canadian Space Agency (CSA) RADARSAT-1 project was conceived in the early 1980s and included discussions with NASA.
NASA provided the Delta II launch vehicle to launch RADARSAT-1 and access to the NASA Deep Space Network (NASA DSN) in exchange for access to its data. Estimates are that the project, excluding launch, cost CA$620 million. The Canadian federal government contributed about CA$500 million, the four participating provinces (Québec, Ontario, Saskatchewan and British Columbia) about CA$57 million, and the private sector about CA$63 million.
RADARSAT International, Inc. (RSI), a Canadian private company, was created in 1989 to process, market and distribute RADARSAT-1 data. (RADARSAT International, Inc. (RSI) was later acquired by MacDonald Dettwiler and Associates.) In 2006, RSI was rebranded MDA Geospatial Services International or MDA GSI.
RADARSAT-1 used a synthetic aperture radar (SAR) sensor designed and built by Canadian Astronautics Limited (CAL) in Ottawa, to image the Earth at a single microwave frequency of 5.3 GHz, in the C band (wavelength of 5.6 cm). The SAR support structure was designed and manufactured by Northrop Grumman Astro Aerospace and deployed to 15 m (49 ft) in length on orbit. Unlike optical satellites that sense reflected sunlight, SAR systems transmitted microwave energy towards the surface and recorded the reflections. Thus, Radarsat-1 imaged the Earth, day or night, in any atmospheric condition, such as cloud cover, rain, snow, dust or haze.
Each of RADARSAT-1's seven beam modes offered a different image resolution. The modes included Fine, which covers an area of 50 × 50 km (31 × 31 mi) (2,500 km2 (970 sq mi)) with a resolution of 10 m (33 ft); Standard, which covered an area of 100 × 100 km (62 × 62 mi) (10,000 km2 (3,900 sq mi)) and had a resolution of 30 m (98 ft); and ScanSAR wide, which covered a 500 × 500 km (310 × 310 mi) (250,000 km2 (97,000 sq mi)) area with a resolution of 100 m (330 ft). RADARSAT-1 also had the unique ability to direct its beam at different angles.
With an orbital period of 100.70 minutes, RADARSAT-1 circled the Earth 14 times a day. The orbit path repeated every 24 days, meaning that the satellite was in exactly the same location and could take the same image (same beam mode and beam position) every 24 days. This was useful for interferometry and detecting changes at that location that took place during the 24 days. Using different beam positions, a location could also be scanned every few days.
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