The purpose of this document is to help users identify the various types of data that are available from the ENVISAT, ERS-1 and ERS-2 Earth observing satellites, the kind of applications that the data may be used for and, importantly, the practical procedures required for access - including user registration and then search, selection and retrieval or ordering of the data of interest.

The document is a brief guide for users to the ENVISAT 2nd generation Radar Altimeter (RA-2) and Microwave Radiometer (MWR) engineering (Level 1B) and geophysical (Level 2) Products Algorithms. Its immediate purpose is to convey basic information to users. The RA-2/MWR Product Handbook, which is now being drafted, will contain full details of the information needed by the users to exploit the RA-2/MWR data products.

Definition of parameters to be used to generate inherent optical properties for the ocean and atmosphere as a function of geophysical properties and wavelengths, required for operating and testing of the MERIS ground segment processor. The current version is composed by 4 documents.