Envisat ASAR AP Co- and Cross-polar L0 [ASA_APC/APH/APV_0P]

Envisat ASAR Alternating Polarisation Mode Co- and Cross-polar Level 0 [ASA_APC/APH/APV_0P]

How to Access Data

Data is available on the ESA Online Dissemination System upon Request Evaluation

The process usually takes up to two weeks and there are no deadlines for submitting a service request.

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 you can visit TellUs

Should you need support please contact EOHelp


The ASAR Alternating Polarization Mode Level 0 (Co-polar and Cross-polar H and V) products contain time-ordered Annotated Instrument Source Packets (AISPs) corresponding to one of the three possible polarisation combinations: HH & HV, VV & VH and HH & VV, respectively. The echo samples in the AISPs have been compressed to 4 bits/sample using FBAQ. This is a high-rate, narrow swath mode, so data is only acquired for partial orbit segments. There are two co-registered images per acquisition and may be from one of seven different image swaths. The Level 0 product was produced systematically for all data acquired within this mode. Data Size: 56-100 km across track x 100 km along track

There are three AP Mode Level 0 products:

  • ASA_APH_0P: The Cross-polar H Level 0 product corresponds to the polarisation combination HH/HV.
  • ASA_APV_0P: The Cross-polar V Level 0 product corresponds to the polarisation combination VV/VH.
  • ASA_APC_0P: The Co-polar Level 0 product corresponds to the polarisation combination HH/VV= H and H received/V transmit and V received.



Digital Object Identifier (DOI): European Space Agency, 2016, Envisat ASAR Alternating Polarisation Mode L0 Product. IPF version 6.03.https://doi.org/10.5270/EN1-u55aesn

Spatial coverage: 
90 N, -90 S, -180 W, 180 E
Temporal coverage:
2002-11-15 - 2012-04-08
Date of launch:
Mission status:
Orbit height:
800 km
Orbit type:
Swath width:
5 - 1150 km


level 0


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



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Auxiliary Data
ASAR On The Fly User Manual
User Manual
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
ASAR Product Quality Disclaimer
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