The information provided in this page is applicable to the latest ASAR products, available to users via Fast Registration. To register for these products users will need to log in using their ESA EO-SSO account. If you do not already have an account you can register here.
Level 0 products are derived from the raw satellite data and are the lowest level product available. Level 1 products are then processed from L0 products. Higher level products (Level 2) can then be derived from L1 products; however, this is currently only done with Wave mode. The general layout for all products includes the following records:
Further details are provided in the ASAR product specifications. All ASAR products are provided in ENVISAT format and are processed by the ESA PF-ASAR processor. For information on the latest version of PF-ASAR, see the Processor Releases page.The specifications for the ASAR data products currently made available by ESA are shown in the ASAR Product Table below. Detailed information on all ASAR products can be found in the ASAR Product Handbook.
Table 1. ASAR L1 product types. *Range width depends on swath used.
ASAR data products are currently available through a number of different sources:
High Resolution products
High resolution products are processed from the Level 0 data upon request using the On-The-Fly (OTF) service. These products are not archived but are processed when a product is selected, usually becoming available within a few minutes. The products processed in this manner are:
Once registered, users can access the Level 1 OTF standard service using either EOLI or the Online Dissemination Service. The EOLI Client for browsing the ASAR catalogue and ordering products can be downloaded here. The Online Dissemination Service can be accessed here. To access products through EOLI or the Online Dissemination Service users will need to log in using their ESA EO-SSO account. As Level 0 data is not part of the OTF standard service access is granted only in exceptional circumstances. To access the Level 0 products, users will have to submit a data service request through their Earthnet account justifying and describing their data needs. For more details on the OTF service, please see the ASAR OTF FAQ page.
Medium Resolution products
Once registered, users can access the Level 1 products through the EO Data Gateway. To access products the EO Data Gateway users will need to log in using their ESA EO-SSO account.
Once registered, users can access the Level 1 and Level 2 wave products though the ESA Dissharm FTP server (envwave-ftp-ds.eo.esa.int) using the credentials provided at registration. Information on ASAR Wave Mode data can be found in the 'Envisat ASAR Wave Mode Product Description and Reconstruction Procedure' document here. The purpose of this document is to provide the user community with information to reconstruct and interpret the ocean wave spectral information within the ASAR WV products.