Failed to Enter Orbit
ALOS-3（Advanced Land Observing Satellite-3/DAICHI-3） is a successor of the optical mission of ALOS, "DAICHI". ALOS-3 will achieve improved ground resolution (80 cm) while observing a wide-swath (70 km) by a larger sensor with higher performance compared to ALOS, and continuously observe not only Japan but also global land areas.
The sensor will continuously observe global coverage data and observation data acquired by ALOS-3 is expected to be useful in various fields such as disaster prevention & preparation activities both in peaceful time and emergency situation, for national security in broad sense.
The 80 cm ground resolution of ALOS-3 data enables to detect collapsed buildings and road blockage situation more clearly than the predecessor ALOS (Ground resolution 2.5 m), and it is possible to quickly detect the detail damage situation by comparing the images before and after the disaster. Furthermore, observation data acquired by ALOS-3 is expected to be utilized in many fields not only to maintain and update high accuracy geospatial information data in developing countries, but also to study environmental protection of vegetation and coastal areas using various observation bands.
Under the contract of JAXA who aims to expect the utilization of vitality of the private firm, PASCO Corporation develops ground system, operates satellite and distributes satellite imagery of ALOS-3 in order to conduct the business consistently.
ALOS-3 Main Specifications
| Mission Instrument |
Panchromatic band (black and white) Ground resolution: 0.8 m Swath width: 70km at nadir Multi spectral band (color) 6 bands (Coastal, Blue, Green, Red, Red Edge, Near-Infrared) Ground resolution: 3.2 m Swath width: 70km at nadir |
|---|
| Design lifetime | Over 7years |
|---|---|
| Revisit time | 35 days |
| Operational orbit |
・Sun-synchronous sub recurrent orbit at an altitude of 669 km ・Local solar time at descending node: 10:30 (a.m.) +/- 15 minutes |
*Please visit below link for details.
characteristics
Characteristics of ALOS-3
To realize 80 cm
ground resolution with
70 km wide swath
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Open and Free Satellite image
: 10m resolution -
Also: 2.5m resolution
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ALOS-3: 80cm resolution
（Simulated image）
Two characteristic bands
ALOS-3 newly equips 2 characteristic bands of the wave length suitable to monitor water area (Coastal) and vegetation (Red Edge)
It enables to utilize data in wide areas both in actual usage and fields of study
・The Coastal band is the shorter wave length than blue band and is least absorbed by water, and will be very useful in bathymetric analysis.
・The Red Edge band is the sharp change in leaf reflectance under the lay and will be able to analyze the vegetation conditions.
[Note] Sample images are processed by other satellites' images
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RGB3 bands
composite Image -
RGB3 bands + Coastal band
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RGB3 bands
composite Image -
RGB3 bands + Red Edge band
Continuously observe land
area nationwide and
archive the data images
ALOS-3 will collect multiple images of archive data global basis per year
By utilizing accumulated archive data, it is possible to conduct analysis of monitoring and change detections in more detail.
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Left：
Foot print image of global monitoring -
Right：
Foot print image of the time of observation
Sample images of ALOS-3
The images below are created ALOS-3 pan sharpened samples of 80 cm resolution in accordance with the system specification.
Note: They don't have same observation ranges and geometric information of ALOS-3
*The resolution of images are lower than real data as they are thumbnail images.
