earth online
  • Data
  • Envisat ASAR AP Precision L1 [...

Envisat ASAR AP Precision L1 [ASA_APP_1P]

Envisat ASAR Alternating Polarisation Mode Precision Image

Go to Envisat

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.
Read More

Description

This ASAR Alternating Polarisation Mode Precision product is generated from Level 0 data collected when the instrument is in Alternating Polarisation Mode (7 possible swaths). The product contains two CO-registered images corresponding to one of the three polarisation combination submodes (HH and VV, HH and HV, VV and VH).

This is a stand-alone multi-look, ground range, narrow swath digital image generated using the SPECAN algorithm and the most up to date auxiliary information available at the time of processing. Engineering corrections and relative calibration (antenna elevation gain, range spreading loss) are applied to compensate for well-understood sources of system variability.

Generation of this product uses a technique to allow half the looks of an image to be acquired in horizontal polarisation and the other half in vertical polarisation and processed to 30-m resolution (with the exception of IS1). Absolute calibration parameters are available depending on external calibration activities and are provided in the product annotations.

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

Details

DATA SET SPECIFICATIONS

Spatial coverage:
90 N, -90 S, -180 W, 180 E
Temporal coverage:
2002-11-15 - 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
Resolution:
Medium Resolution - MR (20 - 500 m)

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

Visit page
Product Specifications

ASAR Products Specification - Revision C

Product Specifications

Download
Product Information

Envisat ASAR Sensor Performance, Products and Algorithms

Product Information

Visit page
Technical Note

Envisat ASAR Science and Applications

Technical Note

Download
User Manual

ASAR Product Handbook

User Manual

Download
ASAR Products Anomalies

ASAR Product Quality Disclaimer

ASAR Products Anomalies

Visit page
Product Specifications

More ASAR Documents

Product Specifications

Visit page
Tools

ASAR Software Tools

Tools

Visit page
ESA Earth Observation User Services Portal

Get Help?

ESA Earth Observation User Services Portal

Visit page
Tweet

newsletter

If you want to receive newsletters from ESA please read and accept the Privacy Notice

Cookies & Privacy

We use cookies which are essential for you to access our website and to provide you with our services and allow us to measure and improve the performance of our website. Please consult our Cookie Notice for further information or to change your preferences.