Description
The ENVISAT mission has both global and regional objectives, with the corresponding need to provide data to scientific and application users on various time scales.

ASAR is an all-weather, day-and-night, high-resolution imaging instrument that will provide radar backscatter measurements indicative of terrain structure, surface roughness, and dielectric constant. Important new capabilities of ASAR include beam steering for acquiring images with different incidence angles, dual polarisation, and wide swath coverage.

Important contributions of ASAR to the global mission include:

• measuring sea state conditions at various scales
• mapping ice sheet characteristics and dynamics
• mapping sea ice distribution and dynamics
• detecting large scale vegetation changes
• monitoring natural and man-made pollution over the ocean

ASAR will make a major contribution to the regional mission by providing continuous and reliable data sets for applications such as:

• offshore operations in sea ice
• snow and ice mapping
• coastal protection and pollution monitoring
• ship traffic monitoring
• agriculture and forest monitoring
• soil moisture monitoring
• geological exploration
• topographic mapping
• predicting, tracking and responding to natural hazards surface deformation

Description
The ENVISAT mission has both global and regional objectives, with the corresponding need to provide data to scientific and application users on various time scales.

The primary mission of MERIS is the measurement of sea colour in the oceans and in coastal areas. Knowledge of the sea colour can be converted into a measurement of chlorophyll pigment concentration, suspended sediment concentration and of aerosol loads over the marine domain.

Why measure ocean colour?

Four broad domains of applications of ocean-colour data can be identified:

• the ocean carbon cycle

• the thermal regime of the upper ocean

• the management of fisheries

• the management of coastal zones

For more details please visit: http://www.ioccg.org.

Description
The ENVISAT mission has both global and regional objectives, with the corresponding need to provide data to scientific and application users on various time scales.

The prime scientific objective of the Advanced Along Track Scanning Radiometer (AATSR) is to establish continuity of the ATSR-1 and ATSR-2 data sets of precise sea surface temperature (SST), thereby ensuring the production of a unique 10 year near-continuous data set at the levels of accuracy required (0.3 K or better) for climate research and for the community of operational as well as scientific users who have been developed through the ERS-1 and ERS-2 missions.

Description
Over 8 million images from SPOT 1-5. Archived back to 1986. Available in country and regional views as well. Searchable by name, location and identifier.