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.


Status: Operational
Satellite ENVISAT
Launch Date: March 2002
Type: Imaging multi-spectral radiometers (vis/IR) & Multiple direction/polarisation radiometers
Measurements and Applications: Measurements of sea surface temperature, land surface temperature, cloud top temperature, cloud cover, aerosols, vegetation, atmospheric water vapour and liquid water content

Technical Characteristics

Resolution: 1 km
N. of Bands: 7

VIS - NIR: 0.555 µm, 0.659 µm, 0.865 µm,
SWIR: 1.6 µm,
MWIR: 3.7 µm,
TIR: 10.85 µm, 12 µm

Swath: 500 km


BEAM http://www.brockmann-consult.de/cms/web/beam/welcome
Drift Correction
Tables and Tools - provided by RAL


ENVISAT Handbook http://envisat.esa.int/handbooks/
AATSR ESA Handbook http://envisat.esa.int/handbooks/aatsr/CNTR3.htm
University of Leicester - AATSR Page http://www.leos.le.ac.uk/aatsr/


AATSR: Instrument Information

General Information

Resource Description
AATSR AATSR Overview at ESA Earthnet
Sensor Information Sensor Information in SensorML Format
Sensor Information Structured Presentation of Sensor Description (derived from SensorML)

Spectral Response Function Information

Graphics Table Reference Title/Description
AATSR-SRF Ch. 1-4 AATSR-SRF Ch. 1-4 AATSR Characteristics AATSR Instrument Characteristics and Performance
AATSR-SRF Ch. 5-7 AATSR-SRF Ch. 5-7 AATSR Characteristics AATSR Instrument Characteristics and Performance