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Instrument image

Advanced Along-Track Scanning Radiometer (AATSR) is one of the Announcement of Opportunity (AO) instruments on board the European Space Agency (ESA) satellite ENVISAT. It is the most recent in a series of instruments designed primarily to measure Sea Surface Temperature (SST), following on from ATSR-1 and ATSR-2 on board ERS-1 and ERS-2. AATSR data have a resolution of 1 km at nadir, and are derived from measurements of reflected and emitted radiation taken at the following wavelengths: 0.55 µm, 0.66 µm, 0.87 µm, 1.6 µm, 3.7 µm, 11 µm and 12 µm.

Special features of the AATSR instrument include its use of a conical scan to give a dual-view of the Earth's surface, on-board calibration targets and use of mechanical coolers to maintain the thermal environment necessary for optimal operation of the infrared detectors.

Not Operational
Imaging multi-spectral radiometers (vis/IR) & Multipledirection/polarisation radiometers
Technical Characteristics
Sea surface temperature: <0.5K over 0.5 deg x 0.5 deg (lat/long)area with 80% cloud cover Land surface temperature: 0.1K (relative)
Spatial Resolution:
IR ocean channels: 1km x 1km, Visible land channels: 1km x 1km
Swath Width:
500 km
VIS - NIR: 0.555, 0.659, 0.865 micrometers, SWIR: 1.6 micrometers,MWIR: 3.7 micrometers, TIR: 10.85, 12 micrometers
Earth Topics
Land ( Vegetation ), Ocean and Coast ( Sea Surface Temperature ), Atmosphere ( Clouds/Precipitation )
Available Resources Type Access
AATSR FAQ Technical Document download
Glossary Technical Document link
AATSR Products Specifications Product Document download
Envisat MAVT-2003 - Working Meeting on MERIS and AATSR Calibrationand Geophysical Validation Proceedings link
AATSR Algorithm Theoretical Basis Document [for LST - Land SurfaceTemperature products] Technical Document download
AATSR Instrument ESA Bulletin download
AATSR Technical Note - Latitude Dependent Bias Correction Technical Document download
AATSR Operations General Reference link
AATSR/SLSTR Land Surface Temperature Portal General Reference link
Annex A - Product Data Conventions Product Document download
Minimize Latest Mission Operations News

ERS, Envisat and TPM - OTF planned maintenance on 3 October 2019

02 October 2019

A software maintenance affecting the On-The-Fly (OTF) Third Party Missions (TPM) and ERS / Envisat (A)SAR data dissemination services has been planned according to the following schedule:

  • ERS and Envisat dissemination service: 3 October from 09:00 to 11:00 CEST
  • TPM dissemination service: 3 October from 11:00 to 14:00 CEST.