ALOS-3

Overview

Advanced Land Observing Satellite-3 (ALOS-3)

The Advanced Land Observing Satellite-3 (ALOS-3) is a successor of the optical mission of ALOS, "DAICHI". ALOS-3 will achieve improved ground resolution (0.8 m) while observing a wide-swath (70 km) by a larger sensor with higher performance compared to DAICHI, and continuously observe not only Japan but also global land areas.

Observation data acquired by ALOS-3 is expected to be useful in various fields such as disaster prevention & preparation activities, maintenance & updates of precise geospatial information, and research & applications on coastal & land environmental monitoring.

Specifications

Items Specifications
Orbit Type Sun-synchronous sub-recurrent
Altitude 669 km at the equator
Local Sun Time 10:30 am +/- 15 minutes at the descending node
Revisit 35 days (Sub-cycle 3 days)
Mission Instrument Wide-swath and high-resolution optical imager
Bands Panchromatic (Pa) 0.8 m GSD, 70km swath @ nadir, 0.52 - 0.76 μm
Multi-band (Mu) 3.2 m GSD, 70 km swath @ nadir
Band 1 0.40 - 0.45 μm, Band 2 0.45 - 0.50 μm, Band 3 0.52 - 0.60 μm
Band 4 0.61 - 0.69 μm, Band 5 0.69 - 0.74 μm, Band 6 0.76 - 0.89 μm
Quantization 11 bit / pixel
Mission data rate Approx. 4 Gbps (after onboard data compression: 1/4 (Pa) and 1/3 (Mu))
Mission data downlink - Direct Transmission: Ka and X-band
- via. the Optical Data Relay Satellite
Mass Approx. 3 tons at launch
Size 5 m×16.5 m×3.6 m on orbit
Duty 10 mins / recurrent
Design life time Over 7 years
ALOS pan-sharpen (GSD 2.5m)
ALOS pan-sharpen (GSD 2.5m)
Simulated ALOS-3 pan-sharpen (GSD 0.8m)
Simulated ALOS-3 pan-sharpen (GSD 0.8m)