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

ERS-1/2 SAR IM Precision 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

 

Description

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

Details

DATA SET SPECIFICATIONS

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
Operators:
ESA
Mission status:
completed
Orbit height:
782 to 785 km
Orbit type:
Sun-synchronous
Swath width:
5 km

PROCESSING LEVEL

level 1

APPLICABLE TERMS & CONDITIONS

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

READ T&C

RESOURCES

ERS SAR auxiliary data
Auxiliary Data
ERS SAR Envisat Format Product Specification
Product Specifications
ERS SAR Sensor Performance, Products and Algorithms
Other
Sentinel-1 Toolbox / Sentinel Application Platform (SNAP)
Software Tool
Derivation of Backscattering Coefficient Sigma 0 in ESA ERS SAR PRI Products
Other
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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