ALOS-2 PALSAR-2 ScanSAR Products

ALOS-2 PALSAR-2 ScanSAR Products

1. Overview

The Japan Aerospace Exploration Agency (JAXA) is pleased to provide public release of ALOS-2 PALSAR-2 ScanSAR Level 2.2 (L2.2) data.

The ScanSAR products are provided as Normalised Radar Backscatter (NRB), formatted in accordance with the Committee on Earth Observation Satellites (CEOS) format specifications for Analysis Ready Data (CEOS ARD). The CEOS ARD format aims to reduce the data processing load for users unfamiliar with satellite data and to improve data machine-readability and analysis-readiness.

For more information about ALOS-2 PALSAR-2, please refer to this URL

2. Product type

2.1 Normalised Radar Backscatter (CEOS ARD NRB)

The new PALSAR-2 ScanSAR products have been developed to conform with the CEOS-ARD format specifications for Normalised Radar Backscatter (CARD4L NRB). The NRB products have been subject to ortho-rectification and Radiometric Terrain Correction (RTC), and are provided in the Gamma-0 backscatter convention, which mitigates the variations from diverse observation geometries. The products include HH and HV polarisation backscatter, local incidence angle image and data mask.

For more information about the CEOS-ARD NRB format, please refer to the Product Family Specification (PFS) document at the following URL.
The PALSAR-2 ScanSAR NRB product is defined as Level 2.2 (L2.2) in accordance with the product levels of PALSAR-2 standard products. Please refer to the following product description for stored data and formatting.

3. Data Availability

Currently, the L2.2 products are being released gradually from the following platforms.
Please refer to each site for information on how to use data on each platform.
  • JAXA G-Portal
  • Google Earth Engine
  • Tellus (Under preparation)
  • Amazon Web Service (AWS, under preparation)
  • NASA Alaska Satellite Facility Data Search (Under preparation)

4. Note for data use

Anyone can use this data free of charge, subject to the terms of use for each platform introduced in "3. Data Availability", and following JAXA "G-Portal Terms of service" (7. Condition concerning of G-Portal data).

5. Contact

ALOS-2/ALOS Science Project

Earth Observation Research Center (EORC)

Japan Aerospace Exploration Agency (JAXA)

E-mail: aprojectjaxa.jp

Please contact us in English or Japanese.

6. References

1. D. Small, (2011) Flattening Gamma: Radiometric Terrain Correction for SAR Imagery. IEEE Transactions on Geoscience and Remote Sensing, 49, 3081-3093.
https://dx.doi.org/10.1109/TGRS.2011.2120616

2. CEOS Analysis Ready Data (CEOS-ARD) web page
https://ceos.org/ard/