Find more Data

Envisat ASAR Wave SLC and Cross-Spectra Imagettes L1 [ASA_WVI_1P]

Envisat ASAR Wave Mode SLC Imagette and Imagette Cross-Spectra

02 Sep 2021

DESCRIPTION

This is the basic Level 1B ASAR Wave Mode product, including up to 400 single-look, complex, slant range, imagettes generated from Level 0 data and up to 400 imagette power spectra computed using the cross-spectra methodology.

The auxiliary parameters used are the most up-to-date at the time of processing. A minimum number of corrections and interpolations are performed in order to allow the end-user maximum freedom to derive higher level products. Complex output data is retained to avoid loss of information. Absolute calibration parameters, when available (depending on external calibration activities), is provided in the product annotations.

Imagette power spectrum is equivalent to the ERS UWA (Near Real Time) product with revisited algorithm (cross-spectra) taking into account the higher quality of the SLC imagette. Note that starting from an SLC imagette, generation of an ERS UWA-type product might be ensured by a simple look detection and summation.

This product provides a continuation of the ERS-SAR wave mode data.

Imagette Spatial Resolution: 20 m ground range x 20 m azimuth

Cross Spectra Output: Wavelength range from 20 to 1000 m in 24 logarithmic steps

DETAILS

DATA SET SPECIFICATIONS

Spatial coverage: 
90 N, -90 S, -180 W, 180 E
Temporal coverage:
2002-10-30 - 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

HOW TO ACCESS THIS DATA

Data is available online on FTP upon users completing an Access Request

For further information about the EO Sign In Service visit TellUS

Should you need support please contact EOHelp

 

APPLICABLE TERMS & CONDITIONS

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

READ T&C

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
Get Help?
ESA Earth Observation User Services Portal