Data Service Request (Restrained)

1. Go to the ESA User Services Portal
2. Register or log in to EO Sign In
3. After logging in, complete and submit the form
4. The request will be evaluated by ESA, which normally takes up to 2 weeks
5. Upon successful evaluation you will receive a confirmation email, which describes the amount of data to be provided, and details of how to download the data from the Dissemination Service.

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, filename, 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.

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.

For further information about the EO Sign In Service you can visit TellUs.

Should you need support to access the data, 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.