Alaska Satellite Facility - Distributed Active Archive Center


Japanese Earth Resources Satellite

JERS-1 SAR Summary


The JERS-1 (Japanese Earth Resources Satellite) SAR is a high-resolution, all-weather imaging radar. Its primary objective was gathering data on global land masses while conducting observation for land surveys, agriculture, forestry, fisheries, environmental protection, disaster prevention, and coastal surveillance.


JERS-1 was launched by the Japan Aerospace Exploration Agency (JAXA), aboard a Japanese H-1 launcher, to provide global and repetitive observations of the environment using techniques that allow imaging to take place in all weather conditions.


The JERS-1 Global Forest Mapping Program mapped important forests of the world: Southeast Asia, Africa, Central America, South America (Amazon Basin), and Boreal North America. ASF distributes the Amazon and Boreal forest SAR mosaics.

Data Products

This is a restricted dataset, and researchers must have permission to download data. Researchers must currently be living in the United States.

Dataset Description:

  • SAR — synthetic aperture radar
  • 1992-1998
  • Imagery coverage is worldwide
  • Datapool contains ASF standard beam odd frames, as well as the first and last frame of each imaged swath
  • Mosaics of global rainforests and the boreal forest
Data Format:
  • CEOS — Level 0 and Level 1 framed

Downloadable Products:

  • Level 0  (raw data)
  • Level 1  (amplitude image)
  • Mosaics — open access
    • Amazon Low Flood
    • Amazon High Flood
    • North America Winter Texture
    • North America Summer Texture
    • North America Summer Backscatter

Coverage map of JERS-1 data in the ASF Archive

JERS-1 Technical Specs

Standard Mode
Frequency/wavelength:​ 1.3 GHz L-band
Polarization:​ HH
Spatial Resolution 18 m
Swath Width 75 km
Off-Nadir Angle 35°

How to Cite JERS-1 Data Retrieved from ASF DAAC

Cite data in publications such as journal papers, articles, presentations, posters, and websites. Please send copies of, or links to, published works citing data, imagery, or tools accessed through ASF to [email protected] with “New Publication” on subject line.

Format Example
Dataset: JERS-1, JAXA [year of data acquisition]. Retrieved from ASF DAAC [day month year of data access]. Dataset: JERS-1, JAXA 1994. Retrieved from ASF DAAC 21 June 2015.

How to Cite JERS-1 Imagery

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

Format Example
© JAXA [year of data acquisition] © JAXA 1994

JERS-1 Datasets and DOIs

Dataset DOI
L0_JERS-1 10.5067/CRIS7FUD12QF
L1_JERS-1 10.5067/P882O8BV02R2