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ALOS PRISM L1C

How To Access Data

Fast Registration with Approval (Restrained)

  1. Go to the ESA User Services Portal
  2. Register or log in to EO Sign In
  3. Submit the form for accessing the data
  4. The request will be evaluated by ESA, which normally takes up to 2 days
  5. Upon successful evaluation, you will receive a confirmation email
  6. A second email will follow with details of where to download the data
  7. Search and download the products from the Dissemination Service (via a map).
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All ALOS-1 PRISM L1C products are freely accessible in accordance with ESA’s Earth observation data policy. An active EO Sign In account is required to download the products.

The data are available for browsing and download from the ALOS Dissemination Service, which also offers an interactive map for identifying available products and previews of the products.

New users can register an account on EO Sign In. For further information about the EO Sign In Service you can visit TellUs.

Should you need support to access the data, please contact EOHelp.

Description

This collection provides access to the ALOS-1 PRISM (Panchromatic Remote-sensing Instrument for Stereo Mapping) OB1 L1C data acquired by ESA stations (Kiruna, Maspalomas, Matera, Tromsoe) in the ADEN zone, in addition to worldwide data requested by European scientists. The ADEN zone was the area belonging to the European Data node and covered both the European and African continents, a large part of Greenland and the Middle East. 

The full mission archive is included in this collection, though with gaps in spatial coverage outside of the ADEN zone. With respect to the L1B collection, only scenes acquired in sensor mode with a Cloud Coverage score lower than 70% and a sea percentage lower than 80% are published:

  • Orbits: from 2768 to 27604
  • Path (corresponds to JAXA track number): from 1 to 665
  • Row (corresponds to JAXA scene centre frame number): from 310 to 6790.

The L1C processing strongly improve accuracy compared to L1B1 from several tenths of metres in L1B1 (~40 m of northing geolocation error for Forward views and ~10-20 m for easting errors) to some metres in L1C scenes (< 10 m both in north and easting errors).

The collection contains only the PSM_OB1_1C EO-SIP product type, using data from PRISM operating in OB1 mode with three views (Nadir, Forward, and Backward) at 35 km wide.

Most of the products contain all three views, but the Nadir view is always available and is used for the frame number identification. All views are packaged together; each view, in CEOS format, is stored in a directory named according to the JAXA view ID naming convention.

Details

DATA SET SPECIFICATIONS

Digital Object Identifier (DOI):
Spatial coverage:
90 N, -90 S, -180 W, 180 E
Temporal coverage:
2006-08-01 - 2011-03-31
Date of launch:
2006-01-24
Operators:
JAXA
Mission status:
Completed
Orbit height:
691.65 km
Orbit type:
Sun-synchronous
Swath width:
35 km
Resolution:
Very High Resolution - VHR (0 - 5m)
Wavelengths:
VIS (0.40 - 0.75 µm)
Product types:
PSM_0B1_1C

PROCESSING LEVEL

Level 1c

APPLICABLE TERMS & CONDITIONS

Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions.

READ T&C

DATA CITATION

European Space Agency, 2023, ALOS PRISM L1C, Version 1.0.

RESOURCES

Technical Note

Information on ALOS Optical Products for ADEN users

Technical Note

Download
Product Description

ALOS User Handbook

Product Description

Download
ESA Earth Observation User Services Portal

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