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The Japanese Earth-Observation satellite ALOS, developed by JAXA and launched on 24 January 2006, had the objective to provide the user community with data of sufficient resolution to be able to generate 1:25,000 scale maps.



ALOS mission objectives set by JAXA were to:

  • Develop Digital Elevation Models (DEMs) and related geographic data products
  • Perform regional observation for 'sustainable development' (harmonization between Earth environment and development)
  • Conduct disaster monitoring around the world
  • Survey natural resources
  • Develop sensor and satellite technology for future Earth-observing satellites

The mission included optical and an active L-band SAR sensor payload whose high-resolution data may be used for environmental purposes.

On 22 April 2011, the ALOS satellite was lost due to a power anomaly and completed its operations phase.

More details

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OADS - OTF maintenance on 21 and 22 Feb 2018

19 February 2018

Due to scheduled maintenance, access to the OADS-OTF online dissemination systems for ALOS PALSAR data and the Third Party Missions (TPM) datasets will be unavailable on 21 and 22 February 2018.

OADS - OTF maintenance on 23 Jan 2018

22 January 2018

Due to a scheduled maintenance, access to the OADS-OTF online dissemination systems for ALOS PALSAR data and the Third Party Missions (TPM) datasets will be unavailable on Tuesday 23 January 2018 during the following time frames:

  • From 09:30 to 11:30 CET - ALOS PALSAR data dissemination
  • From 14:00 to 16:00 CET - TPM data dissemination

Addendum: The maintenance activities were delayed due to unexpected network issues. The ALOS PALSAR maintenance has been completed, and the TPM maintenance has been rescheduled to 25 January.

Minimize Mission Facts and Figures
Operators JAXA (Japan Aerospace Exploration Agency)
Date of Launch 24 January 2006
Status Operations terminated April 2011
Orbit Height 691.65 km
Orbit Type Sun-synchronous near-recursive circular
Repeat Cycle 46 days (with a sub-cycle of 2 days for event monitoring)
Resolution 2.5 m / 10 m multispectral/10-100m SAR
Swath Width 35 – 70 Km/70km/350km

Onboard Sensors provided under TPM

  • PRISM (Panchromatic Remote-sensing Instrument for Stereo Mapping)
  • AVNIR-2 (Advanced Visible and Near-Infrared Radiometer - 2)
  • PALSAR (Phased Array L-band Synthetic Aperture Radar)