ERS-1/2 SAR IM Single Look Complex L1 [SAR_IMS_1P]

ERS-1/2 SAR IM Single Look Complex Image Product

How to Access Data

Users can freely access the collection using the below links and will be requested to login (new users shall register) to ESA EO Sign In to download the products.

ESA internal users can use their ESAAD account.

The products are available for download via the following interfaces:

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. Interferometric search option is available for relevant collections. Data download is available via HTTPS, including bulk download functionality.

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

For further information about the EO Sign In Service you can visit TellUs

Should you need support please contact EOHelp



The SAR SLC product is a single look complex acquired in Image Mode. It is a digital image, with slant range and phase preserved, generated from raw SAR data using up-to-date auxiliary parameters. The products are intended for use in SAR quality assessment, calibration and interferometric applications. A minimum number of corrections and interpolations are performed on the data. Absolute calibration parameters (when available) are provided in the product annotation.

Product characteristics:

  • Pixel size: 8 m (range - across track) x 4 m (azimuth - along track – varying slightly depending on acquisition Pulse Repetition Frequency)
  • Scene area: 100 km (range) x at least 102.5 km (azimuth)
  • Scene size: 5000 samples (range) x at least 30000 lines (azimuth)
  • Pixel depth: 32 bits signed integer (16 bits I, 16 bits Q)
  • Total product volume: 575 MB
  • Projection: Slant range- Number of looks: 1



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



ERS SAR auxiliary data
Auxiliary Data
ERS SAR Envisat Format Product Specification
Product Specifications
ERS SAR Sensor Performance, Products and Algorithms
Sentinel-1 Toolbox / Sentinel Application Platform (SNAP)
Software Tool
Review of the impact of the ERS-2 Piloting Modes on the SAR Doppler Stability
Software Tool
More SAR Documents
Technical Note
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