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Envisat ASAR IM Precision L1 [ASA_IMP_1P]

Envisat ASAR Image Mode Precision Image

Data

02 Sep 2021

Envisat DOWNLOAD Dataset available after EO SIGN IN registration.

blue arrow 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

blue arrow DETAILS

blue arrow 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

blue arrow PROCESSING LEVEL

level 1b,

blue arrow HOW TO ACCESS THIS 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:

ESA EO Multimission Catalogue (EO CAT) - Allows users to discover and search products among the available datasets from ESA and Third Party Missions and instruments, using various criteria (spatial, temporal, specific).

 

ESA ERS and Envisat (A)SAR dedicated Online Dissemination Service - 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 visit TellUS

Should you need support please contact EOHelp

 

blue arrow APPLICABLE TERMS & CONDITIONS

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

READ T&C

blue arrow RESOURCES

ASAR auxiliary data
Auxiliary Data
ASAR Products Specification - Revision C
Product Specifications
Envisat ASAR Sensor Performance, Products and Algorithms
Product Information
Envisat ASAR Science and Applications
Technical Note
ASAR Product Handbook
User Manual
More ASAR Documents
Product Specifications
ASAR Software Tools
Tools
Get Help?
ESA Earth Observation User Services Portal