ALOS PALSAR – How to Cite

Citing ALOS PALSAR Data or Imagery

Cite datasets in publications such as journal papers, articles, presentations, posters, and websites. Include the DOI when available (each RTC ALOS PALSAR dataset processed by ASF has an assigned DOI). Please send copies of, or links to, published works citing data, imagery, or tools accessed through ASF to uso@asf.alaska.edu with “New Publication” on subject line.

Type of Dataset Format Example
ALOS PALSAR L1.0 or L1.5 Dataset: ©JAXA/METI ALOS PALSAR [dataset name] [year of data acquisition]. Accessed through ASF DAAC, [link to website or insert comma and spell out in print: https://asf.alaska.edu] [day/month/year of data access] Dataset: © JAXA/METI ALOS PALSAR L1.0 2007. Accessed through ASF DAAC 11 June 2015.
ALOS PALSAR RTC Dataset: [creator credit, year created], [dataset name]; Includes Material © JAXA/METI [year of data acquisition]. Accessed through ASF DAAC, [link to website or insert comma and spell out in print: https://asf.alaska.edu] [day/month/year of data access]. DOI: [DOI] Dataset: ASF DAAC 2015, ALOS PALSAR_Radiometric_Terrain_Corrected_low_res; Includes Material © JAXA/METI 2007. Accessed through ASF DAAC 11 November 2015.
DOI: https://doi.org/10.5067/JBYK3J6HFSVF

Crediting ALOS PALSAR Imagery

Include appropriate credit with each image shown in publications such as journal papers, articles, presentations, posters, and websites.

Type Format Example
Imagery, primary or derivative ©JAXA/METI [year of data acquisition]. © JAXA/METI 2007.
Imagery, value added [creator credit, year created]; Includes Material © JAXA/METI [year of data acquisition]. ASF DAAC 2014; Includes Material © JAXA/METI 2007.

ALOS PALSAR RTC Datasets and DOIs

Dataset DOI
PALSAR_Radiometric_Terrain_Corrected_low_res https://doi.org/10.5067/JBYK3J6HFSVF
PALSAR_Radiometric_Terrain_Corrected_high_res https://doi.org/10.5067/Z97HFCNKR6VA
L1.0_PALSAR https://doi.org/10.5067/J4JVCFDDPEW1
L1.1_PALSAR https://doi.org/10.5067/PAFUZQHBZF3A
L1.5_PALSAR https://doi.org/10.5067/NXY378J3DFZQ

ALOS PALSAR – Terms and Conditions

ALOS PALSAR Standard Product License Agreement

The Alaska Satellite Facility (ASF) grants the End User use of Advanced Land Observing Satellite (ALOS) PALSAR data if the End User accepts and agrees to the following ALOS PALSAR Standard Product End User License Agreement. The End User will be deemed to have accepted and agreed to the terms and conditions if the End User starts using ALOS PALSAR data including but not limited to downloading, installing, manipulation or other action.

Section 1 Definitions

1. “End User” means the person, legal business entity, public entity or any other legal entity who obtains the Product and is considered to have accepted this End User License Agreement. In the case of a public entity, the End User is deemed to be only the part, division, etc. of the public entity located at the address to which the Product is supplied, unless otherwise agreed upon by ASF in writing and in advance.

Standard Product – Level 1 Data (CEOS format) PALSAR Level 1.0, 1.1, 1.5

Derivative Work Product – A processed product using the Standard Product which retains the original pixel structure and can be converted back to the original data or a processed product that does not retain the original pixel structure and cannot be converted back to the original data , with the exception of value-added products

Value Added Product (VAP) – A modified Standard or Derivative Work Product with high-level processing that cannot be converted back to the original product. The high-level processing includes data analysis or combining multiple-satellite data, image processing based on external information, and physical quantity conversion.

2. “Product” means any ALOS satellite data product supplied by ASF.  Product is classified as standard product, Derivative-work Product and Value Added Product (VAP). Definition of the three product types is shown below.

3. “JAXA” means the Japan Aerospace Exploration Agency.

4. “METI” means the Japanese Ministry of Economy, Trade, and Industry.

5. “Related Parties” means the parties that have been involved in the creation, production, distribution or delivery of the Product.

Section 2 Permitted Uses

 1. The End User shall utilize the Product for peaceful purposes only.

 2. The End User may redistribute the Product provided the data source is attributed to JAXA/METI.

Section 3 Prohibited Uses

 1. The End User shall not use the Product other than for peaceful purposes.

 2. The End User shall not delete, obscure, remove or alter any copyright notice that is contained in or appears on the Product.

 Section 4 Intellectual Property Right and Copyright Notice

 1. The End User confirms that JAXA and METI own all intellectual property rights, including copyrights, for ALOS PALSAR Standard and Derivative-work products.

 2. The End User owns all intellectual property rights, including copyrights, which result from the End User’s act of interpretation, adaptation, authorship or any other work on the Standard Product resulting in the creation of a VAP. All VAP products must be accompanied with the copyright notice.

 3. The End User agrees that any embodiment of the Product permitted under this agreement shall contain the following copyright notice.  The copyright notice shall be prominently displayed and the [Year] field correctly filled with a numerical value corresponding to the year of raw data acquisition.

    Copyright Notice

    Standard Product – ©JAXA,METI [Year]    Derivative Work Product – ©JAXA,METI [Year]    Value Added Product – Includes Material ©JAXA,METI [Year]

Section 5 Limited Warranty – Disclaimer

 1. Neither ASF nor the Related Parties, if any, warrants that the Product is free of bugs, errors, defects or omissions.

 2. The Product is provided as is with no warranty of merchantability or fitness for a particular purpose.

 3. ASF and the Related Parties shall have no liability to the End User for any damage suffered by the End User or any third party, as a result of using ALOS PALSAR products. This damage is including but not limited to consequential loss and lost earnings.

Section 6 Modification of this Agreement

ASF reserves the right to modify this agreement if necessary and the modified agreement will govern. In the case of modification ASF will announce on ASF internet site.

Section 7 Governing Law and Jurisdiction

This End User License Agreement shall be governed by the laws of the United States of America.

ALOS PALSAR RTC Product License Agreement

The Alaska Satellite Facility (ASF) grants the End User use of Radiometrically Terrain Corrected (RTC) Advanced Land Observing Satellite (ALOS) PALSAR data if the End User accepts and agrees to the following ALOS PALSAR RTC End User License Agreement. The End User will be deemed to have accepted and agreed to the terms and conditions if the End User starts using ALOS PALSAR RTC data including but not limited to downloading, installing, manipulation or other action.

Section 1 Definitions

 1. “End User” means the person, legal business entity, public entity or any other legal entity who obtains the Product and is considered to have accepted this End User License Agreement. In the case of a public entity, the End User is deemed to be only the part, division, etc. of the public entity located at the address to which the Product is supplied, unless otherwise agreed upon by ASF in writing and in advance.

Value Added Product (VAP) – A modified Standard or Derivative Work Product with high-level processing that cannot be converted back to the original product. The high-level processing includes data analysis or combining multiple-satellite data, image processing based on external information, and physical quantity conversion.

 2. “Product” means any ALOS RTC satellite data product supplied by ASF.  Product is classified as Value Added Product (VAP). Definition of the product types is shown below.

 3. “JAXA” means the Japan Aerospace Exploration Agency.

 4. “METI” means the Japanese Ministry of Economy, Trade, and Industry.

 5. “Related Parties” means the parties that have been involved in the creation, production, distribution or delivery of the Product.

Section 2 Permitted Uses

These data are provided in accordance with NASA’s free and open data policy. There are no restrictions on their use.

Section 3 Prohibited Uses

1. The End User shall not delete, obscure, remove or alter any copyright notice that is contained in or appears on the Product.

Section 4 Intellectual Property Right and Copyright Notice

1. The End user confirms that NASA retains the copyright to the ALOS PALSAR RTC products, and that JAXA/METI retain the copyright to the original data from which the Product was derived.

2. The End User owns all intellectual property rights, including copyrights, which result from the End User’s act of interpretation, adaptation, authorship or any other work on the Product resulting in the creation of another VAP. All VAP products must be accompanied with the appropriate copyright notice.

3. The End User agrees that any embodiment of the Product permitted under this agreement shall contain the following copyright notice.  The copyright notice shall be prominently displayed and the [Year] field correctly filled with a numerical value corresponding to the year of raw data acquisition.

    Copyright Notice for ALOS PALSAR RTC: © NASA [Year], Includes Material © JAXA, METI [Year]

Section 5 Limited Warranty – Disclaimer

1. Neither ASF nor the Related Parties, if any, warrants that the Product is free of bugs, errors, defects or omissions.

2. The Product is provided as is with no warranty of merchantability or fitness for a particular purpose.

3. ASF and the Related Parties shall have no liability to the End User for any damage suffered by the End User or any third party, as a result of using ALOS PALSAR RTC products. This damage is including but not limited to consequential loss and lost earnings.

Section 6 Modification of this Agreement

ASF reserves the right to modify this agreement if necessary and the modified agreement will govern. In the case of modification ASF will announce on ASF internet site.

Section 7 Governing Law and Jurisdiction

This End User License Agreement shall be governed by the laws of the United States of America.

ALOS PALSAR – Documents and Tools

PALSAR

Name Description
ALOS Data Users Handbook, 2008 Overview of the ALOS Project and related technological information on satellites and land systems
ALOS User Guide Overview, products, product format, operations
PALSAR Product Format Detailed L1.1 and L1.5 product format description
PALSAR Product Format (zip file downloads) Detailed L1.0 product format description

Radiometrically Terrain-Corrected (RTC)

Name Description
RTC Product Guide, 2015 Guide for radiometrically terrain-corrected products.
RTC Product Specification, 2014 This product format specification defines standard terrain-corrected products generated at ASF. It contains the definition for the ISO-compliant XML metadata.
RTC ATBD, 2015 Algorithm theoretical basis document: Provides the theoretical background of the algorithms and processing flows used for the generation of terrain-corrected products processed by ASF.

Software Tools

Name Description
MapReady, ASF Terrain correct, geocode, and apply polarimetric decompositions to multi-pol SAR data
Convert to Vector, ASF Transform point or scene information to formats compatible with Google Earth, GIS, and more
SAR Training Processor, ASF Learn SAR processing
Bulk Download, ASF Bulk download from the ASF datapool via Metalink files
Other Software Tools Access a variety of tools for viewing, analyzing, and processing radar data

GIS Platforms

RTC GeoTIFF products are readily visualized in GIS programs such as ArcGIS or QGIS.

Name Description
QGIS: open source Windows, Mac, Linux, BSD
ArcGIS: commercial software Windows, Linux

Processors

PALSAR Processor versions used to process data at ASF
Processing Dates Processor Version JAXA Calibration Result as of (MM-DD-YYYY)
April 18, 2007- April 26, 2007 3.00 10-23-2006
3-29-2007
April 27, 2007- March 17, 2008 4.00 3-29-2007
9-28-2007
March 18, 2008 - June 12, 2008 4.03 9-28-2007
June 13, 2008 - February 3, 2009 5.00 9-28-2007
February 4, 2008 - ? 5.04 9-28-2007
7-1-2009
September, 2013 6.07 9-6-2011
Optical Processor versions used to process data at ASF
Processing Dates Processor Version JAXA Calibration Result as of (MM-DD-YYYY)
April 18, 2007- April 26, 2007 3.00 10-23-2006
3-29-2007
April 27, 2007- March 30, 2009 4.01 3-29-2007
9-28-2007
March 31, 2009 - February 3, 2010 5.02 9-28-07
7-1-2009
February 4, 2010 - January 18, 2011 5.09 7-1-2009
January 18, 2011 - Present 6.03 7-1-2009
palsar

ALOS PALSAR – About

ALOS Phased Array type L-band Synthetic Aperture Radar

Mission

From 2006 to 2011, PALSAR’s L-band synthetic aperture radar (SAR) yielded detailed, all-weather, day-and-night observation, as well as repeat-pass interferometry. PALSAR data are from multiple observation modes with variable polarization, resolution, swath width, and off-nadir angle.

PALSAR was one of three instruments on the Advanced Land Observing Satellite-1 (ALOS), also known as DAICHI, developed to contribute to the fields of mapping, precise regional land-coverage observation, disaster monitoring, and resource surveying. ALOS was a mission of the Japan Aerospace Exploration Agency (JAXA).

ASF PALSAR Products

Product Type Format Open Access
L1.0 Unprocessed/raw n/a Find Data
L1.5 Georeferenced amplitude image CEOS Find Data
RTC Radiometrically and terrain-corrected geocoded GeoTIFF image GeoTIFF Find Data

Note 1: L1.0 and L1.5 products may have originated from older JAXA processor versions.

Note 2: Users may request L1.1 data – if not already available through Vertex or the ASF API – by contacting our User Support Office, uso@asf.alaska.edu. Please provide a list of the granule names you wish to have processed.
L1.1 processing is not possible for data acquired in ScanSAR beam mode (WB1 and WB2).

How to Obtain PALSAR Data

Researchers can download open-access ALOS PALSAR data from the NASA-sponsored ASF DAAC.

PALSAR Technical Specs — Beam Modes

PALSAR has two fine beam modes: single polarization (FBS) and dual polarization (FBD), as well as quad polarization, also known as polarimetric mode (PLR). ScanSAR wide beam (WB1, WB2) operates with a considerable loss of resolution. See table below.

palsar
Fine Resolution ScanSAR Polarimetric
Beam Mode FBS, DSN FBD WB1, WB2 PLR
Center Frequency L-Band (1.27 GHz)
Polarization HH or VV HH+HV or VV+VH HH or VV HH+HV+VV+VH
Spatial Resolution 10 m 20 m 100 m 30 m
Swath Width 70 km 70 km 250-350 km 30 km
Off-Nadir Angle 34.3° (default) 27.1° (default) 21.5° (default)

PALSAR cannot observe the areas beyond 87.8 degrees north latitude and 75.9 degrees south latitude when the off-nadir angle is 41.5 degrees.

Read more on the JAXA website.