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Envisat ASAR IM Precision L1 [ASA_IMP_1P]

Envisat ASAR Image Mode Precision Image

How to Access Data

EO Sign In Authentication (Open)

  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. ESA internal users can use their ESAAD account.

Envisat 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 User Manual.

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

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

Available to Residents of the Following Countries

World Wide

Collection Description

This is a multi-look, ground range, digital Precision Image generated from Level 0 data collected when the instrument was in Image Mode (7 possible swaths HH or VV polarisation). The product includes slant range to ground range correction. It is for users wishing to perform applications-oriented analysis and applies to multi-temporal imaging and to derive backscattering coefficients.

The stand-alone image is generated using the Range/Doppler algorithm. The processing uses up to date (at time of processing) auxiliary parameters corrected for antenna elevation gain, and range spreading loss. Engineering corrections and relative calibration are applied to compensate for well-understood sources of system variability. Absolute calibration parameters, when available (depending on external calibration activities) are provided in the product annotations.

This product provides a continuation of the ERS-SAR_PRI product.

Spatial Resolution: 30 m ground range x 30 m azimuth.

Technical Details

DATA SET SPECIFICATIONS

Spatial coverage:
90 N, -90 S, -180 W, 180 E
Temporal coverage:
2002-10-18 - 2012-04-08
Date of launch:
2002-03-01
Operators:
ESA
Mission status:
completed
Orbit height:
800 km
Orbit type:
Sun-synchronous
Swath width:
5 - 1150 km

PROCESSING LEVEL

level 1b

APPLICABLE TERMS & CONDITIONS

Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions
READ T&C

Resources

Auxiliary Data

ASAR auxiliary data

Auxiliary Data

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Product Specifications

ASAR Products Specification - Revision C

Product Specifications

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Product Information

Envisat ASAR Sensor Performance, Products and Algorithms

Product Information

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Technical Note

Envisat ASAR Science and Applications

Technical Note

Download
User Manual

ASAR Product Handbook

User Manual

Download
Product Specifications

More ASAR Documents

Product Specifications

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Tools

ASAR Software Tools

Tools

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Software Tools

ENVISAT Software tools

Software Tools

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ESA Earth Observation User Services Portal

Get Help?

ESA Earth Observation User Services Portal

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