ERS-1/2 SAR IM Medium Resolution L1 [SAR_IMM_1P]

ERS-1/2 SAR Medium Resolution Image - Level 1 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



This ERS Medium Resolution stripline product is generated from the Image Mode Level 0 Product. Stripline image products contain image data for an entire segment, up to a maximum size of 10 minutes per product for IM mode. The processor concatenates together several sub-images called "slices" that were processed separately on a dataset-by-dataset basis in order to form the entire stripline image. The product is processed to an approximately 150 m x 150 m resolution and has a radiometric resolution that is good enough for ice applications. This product has a lower spatial resolution than the SAR_IMP_1P and SAR_IMS_1P products.

Product Characteristics:

  • Pixel size: 5 m (ground range – across track) x 75 m (azimuth – along track)
  • Scene area: 100 km (range) x at least 102.5 km
  • Scene Size: 1300 pixels (range) x at least 1350 lines (azimuth)
  • Pixel depth: 16 bits unsigned integer- Total product volume: at least 3.5 MB
  • Projection: Ground-range
  • Number of looks: 8 (azimuth) x 7 (range)



Digital Object Identifier (DOI):

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
Current Processor Version:
PF-ERS / Envisat format


level 1


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


blue arrow DATA CITATION

European Space Agency, 2017-2021, ERS-1/2 SAR Image Mode Medium Resolution Level 1 Product. IPF version 6.01.


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
Technical note
More SAR Documents
Technical Note
SAR Product Quality Disclaimer
Quality disclaimer
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