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Advanced Land Observing Satellite 4 (ALOS-4), also called Daichi 4 (daichi is a Japanese word meaning "great land"), is a 3,000 kg (6,600 lb) Japanese L-band synthetic-aperture radar (SAR) satellite that was launched on July 1, 2024.
Only 52 of 4,300 images of Japan could be updated based on data from ALOS. [4] [5] Then, JAXA announced the problem was solved. [6] ALOS was used to analyze several disaster sites. [7] [8] [9] Images of the devastated Japanese coast following the 2011 Tōhoku earthquake and tsunami were among the last major contributions from ALOS. [10] [11]
ALOS-3 carried OPS (OPtical Sensor), a multi-band optical camera which is an upgrade from the PRISM sensor. [2] OPS was capable of observing a 70-kilometer (43 mi) wide strip of land on Earth. [5] In addition to the RGB and infrared band covered by the predecessor ALOS satellite, ALOS-3 has two additional bandwidths: coastal and red edge.
The satellite contains a 1.2 GHz synthetic-aperture radar (SAR) sensor that is intended to be used for cartography, monitoring of naval traffic and disaster monitoring of Asia and the Pacific. [3] JAXA initially hoped to be able to launch the successor to ALOS during 2011, but these plans were delayed until 2014 because of budget restrictions.
ALOS-4 (Daichi 4) JAXA: Low Earth Earth observation: In orbit: Operational First Operational flight of H3 rocket. ALOS-4 (Daichi 4) will replace the ALOS-2 (Daichi 2) satellite, which was launched in 2014. 3 July 08:55 [3] Falcon 9 Block 5: Starlink Group 8-9 Cape Canaveral SLC-40: SpaceX: Starlink × 20 SpaceX: Low Earth: Communications: In ...
Changed from the originally manifested ALOS-4 due to the launch failure of H3-TF1 / ALOS-3. First successful flight of the H3 launch vehicle. Separation of VEP-4 was performed after the deorbit burn of the second stage. 17 February 12:05 [44] GSLV Mk II: F14: Satish Dhawan SLP: ISRO: INSAT-3DS [45] ISRO: Geosynchronous: Meteorology: In orbit ...
But in 2015, the ALOS PALSAR data became unrestricted, [28] and the Sentinel-1 data is also unrestricted. [19] In June 2013, the Alaska Satellite Facility released newly processed, 35-year-old data [29] from the 1978 Seasat satellite mission. [30] Before this release, only 20 percent of the Seasat SAR data had been processed digitally. [31]
Spacecom paid US$100 million for AMOS-4. The Israeli government paid Spacecom US$265 million generated from a pre-launch deal to supply it with services on AMOS-4 over the satellite's full 12 year life span. AMOS-4 was originally considered as a candidate for launch on a SpaceX Falcon-9 launch vehicle.