| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Atmosphere >
Atmospheric Humidity Fields >
Water vapour imagery
  | Measurement Definition*: Level-1 product (not a geophysical parameter). Multi-channel imagery covering wavelengths in the range 0.4-14 µm including water vapour bands for atmospheric tracing in clear-air at more levels (e.g., for winds) - Accuracy expressed as Modulation Transfer Function (MTF) at the Nyquist spatial wavelength (twice the resolution). Actually [ MTF-1 ] is used, so that smaller figures correspond to better performance, as usual.
Thematic Links |
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
AHI
Advanced Himawari Imager | Operational
| Measures cloud cover, cloud motion, cloud height, cloud properties, water vapour, rainfalll, sea surface temperatures and Earth radiation, dust, aerosols, volcanic ash, fires, snow and ice cover. | Multi-purpose imaging Vis/IR radiometer | |
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. | Multi-purpose imaging Vis/IR radiometer | |
EMI-2
Environment Monitoring Instrument-2 | Operational
| Ozone profile and total-column or gross profile of other species. Tracked species: BrO, ClO H2O, HCHO, NO, NO2, O3, SO2 and aerosol | n/a | |
ACX
GeoXO Atmospheric Composition Instrument | Being developed
| | n/a | |
METimage
Multi Spectral Imager | Being developed
| Operational multi spectral imager for meteorological EPS-SG VIS/IR Imaging Mission (VII): imagery data for global and regional NWP, NWC, and climate monitoring with information on LST, SST, clouds coverage, height and micro-physics, land surfaces (vegetation, snow/ice, fire), water vapour column, aerosol and atmospheric motion vectors. Provides collocated cloud mask, height & characterisation as well as intra-pixel heterogeneity to other EPS-SG missions (with larger footprint). | Multi-purpose imaging Vis/IR radiometer | |
MWI
Microwave Imager | Being developed
+/-50 % | Measure cloud liquid water content, solid/liquid precipitation information, total column water vapour and temperature profiles, sea ice parameters, sea surface temperature, sea surface wind speed. | n/a | |
GHMI
Geostationary HiMawari Imager | Approved
| | Multi-purpose imaging Vis/IR radiometer | |
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* Description adapted from WMO.
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