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Advanced Land Observing Satellite (ALOS), also called Daichi (a Japanese word meaning "land"), was a 3810 kg Japanese satellite launched in 2006. After five years of service, the satellite lost power and ceased communication with Earth, but remains in orbit.
Although the predecessor ALOS satellite had featured 2 optical cameras in addition to L-band (1.2 GHz/25 cm) radar, ALOS-2 had optical cameras removed to simplify construction and reduce costs. The PALSAR-2 radar is a significant upgrade of the PALSAR radar, allowing higher-resolution (1 x 3 m per pixel) spotlight modes in addition to the 10 m ...
The AVNIR was a multispectral radiometer for observing the Earth in the visible and near-IR wavelengths at high spatial resolution. The AVNIR employs a Schmidt optical system and an electronic scanning CCD silicon array. The AVNIR consisted of three visible channels (0.40-0.50, 0.52-0.62, 0.62-0.72 microns) and one near-IR channel (0.82-0.92 ...
[4] [5] FM3 had severe power problems since 6 July 2010. It was declared not functional since then. FM4, FM5, and FM6 have had battery aging problem. [6] The data published by the COSMIC-1 constellation has been used in weather models to improve the quality of weather forecasts. [7] On 1 May 2020, the satellite constellation was retired. [8]
ALOS-4 is further enhanced from ALOS-2 by equipping the new PALSAR-3 synthetic aperture radar, which employs the new digital beamforming SAR technology. While the observation range in spotlight mode with a resolution of 1 m x 3 m was 25 km square for ALOS-2, ALOS-4 enables observation over a 35 km square area.
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The exact problem lay with the circuitry having to do with the stabilizing momentum wheel. [14] Anik E2 was not restored to service for five months; users had to relocate services to Anik E1 and reposition satellite dishes; for some users, such as Northwestel in northern Canada , it meant days of flying technicians from one community to another ...