| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Atmosphere >
Aerosols >
Visibility
  | Measurement Definition*: The aerosol optical depth or optical thickness (τ) is defined as the integrated extinction coefficient over a vertical column of unit cross section. |
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
AMI
Advanced Meteorological Imager | Operational
| Continuous monitoring capability for the near real-time generation of high-resolution meteorological products and long-term change analysis of land/sea surface temperature and cloud coverage. | n/a | |
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* Description adapted from WMO.
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