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ERS-1/2 SAR IM Precision L1 [SAR_IMP_1P]

ERS-1/2 SAR IM Precision Image Product

How To Access Data

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  1. Go to the Dissemination Service
  2. Find the product you want via a map using the catalogue search
  3. Register or log in to EO Sign In
  4. Download.
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The ESA (A)SAR On-the-fly (OTF) data processing and dissemination service allows end-users to gain direct access to the (A)SAR archive from the ERS-1, ERS-2 and Envisat Missions.

The data is collection based and allows data browse and download through the treeview as well as via geographical catalogue search based on area of interest and metadata. Data download is available via HTTPS, including bulk download functionality.

ERS products can also be discovered through ESA's EO Catalogue (EO CAT), which allows users to browse and download products among the available datasets from ESA and Third Party Missions and instruments, using various criteria (spatial, temporal).

For information on the (A)SAR On-The-Fly service please refer to the OTF FAQ page.

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

For internal ESA users the ESAAD account cannot be used.

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


The SAR Precision product is a multi-look (speckle-reduced), ground range image acquired in Image Mode. This product type is most applicable to users interested in remote sensing applications, but is also suitable for calibration purposes. The products are calibrated and corrected for the SAR antenna pattern and range-spreading loss. Radar backscatter can be derived from the products for geophysical modelling, but no correction is applied for terrain-induced radiometric effects. The images are not geocoded, and terrain distortion (foreshortening and layover) has not been removed.

The numbering sequence relates to the satellite position and therefore differs between Ascending and Descending scenes.

Product characteristics:

  • Pixel size: 12.5 m (range - across track) x 12.5 m (azimuth - along track)
  • Scene area: 100 km (range) x at least 102.5 km (azimuth)
  • Scene size: 8000 pixels range x at least 8200 lines (azimuth)
  • Pixel depth: 16 bits unsigned integer
  • Total product volume: 125 MB
  • Projection: Ground-range
  • Number of looks: 3.



Spatial coverage:
82 N, -82 S, -180 W, 180 E
Temporal coverage:
1991-07-27 - 2011-07-04
Date of launch:
1995-04-21, 1991-07-17
Mission status:
Orbit height:
782 to 785 km
Orbit type:
Swath width:
5 km


Level 1


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



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