| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
ACE-FTS
Atmospheric Chemistry Experiment (ACE) Fourier Transform Spectrometer | Operational
| Measure and understand the chemical processes that control the distribution of ozone in the Earth's atmosphere, especially at high altitudes. | Limb-scanning IR spectrometer |  |
GEMS
Geostationary Environment Monitoring Spectrometer | Operational
| Measurements of atmospheric chemistry, precursors of aerosols and ozone in particular, in high temporal and spatial resolution over Asia. | n/a | |
LMI
Lightning Mapping Imager | Operational
| Lightning mapping for locating thunder storms in flooding season, CCD camera operating 0.77 µm to count flashes and intensity. | n/a | |
MAESTRO
Measurements of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation | Operational
| Chemical processes involved in the depletion of the ozone layer, and now including a high quality water vapour data product. | Limb-scanning SW spectrometer | |
NACHOS Hyperspectral Imager
NACHOS Hyperspectral Imager | Operational
| | High-resolution nadir-scanning SW spectrometer | |
OSIRIS
Optical Spectrograph and Infra-Red Imaging System | Operational
| Detects aerosol layers and abundance of species such as O3, NO2, OClO, BrO and NO. Consists of spectrograph and IR imager. | Limb-scanning SW spectrometer | |
SAGE-III
Stratospheric Aerosol and Gas Experiment | Operational
| Limb-viewing measurements of aerosol, O3, H20, NO2, OClO, NO3, temperature and pressure in the stratosphere, upper troposphere, and mesosphere using solar occultation, lunar occultation and limb scatter measurement techniques. | Limb-scanning SW spectrometer | |
UVNS (Sentinel-5 precursor)
TROPOMI | Operational
| Supporting atmospheric composition and air quality monitoring services. | High-resolution nadir-scanning SW spectrometer | |
CO2I
Integrated CO2 & NO2 Imaging spectrometer | Being developed
| Pushbroom scanning spectrometer to provide relatively high spatial resolution CO2, CH4 and NO2 observations in support of estimating anthropogenic emissions of CO2 and CH4 in Copernicus. In addition, high quality NO2 and solar-induced fluorescence will be operationally delivered. | High-resolution nadir-scanning SW spectrometer | |
GEOXO Atmospheric Composition
GEO Extended Operations Atmospheric Composition | Being developed
| | n/a | |
Spectrometer (TEMPO)
Spectrometer (TEMPO) | Being developed
| Hourly measurements of air pollution over North America, from Mexico City to the Canadian oil sands, at high spatial resolution. Measurements in ultraviolet and visible wavelengths will provide a suite of products including the key elements of tropospheric air pollution chemistry. Will be part of the first global geostationary constellation for pollution monitoring, along with European and Korean missions now in development. | High-resolution nadir-scanning SW spectrometer | |
UVNS (Sentinel-5)
Ultra-violet Visible Near-infrared Shortwave-infrared spectrometer | Being developed
| Supporting atmospheric composition and air quality monitoring services. Measurements of atmospheric trace gases, primarily O3, NO2, SO2, HCHO, CH4 and CO. | High-resolution nadir-scanning SW spectrometer | |
GHMS
Geostationary HiMawari Sounder | Approved
| | n/a | |
UVN
UV-VIS-NIR Sounder | Approved
| Measurements of atmospheric trace gases, mainly O3, NO2, SO2, H2CO. The product list is not yet approved, the accuracy summary column lists the breakthrough user requirements. | High-resolution nadir-scanning SW spectrometer | |
UVN (Sentinel-4)
UV-visible- near infrared imaging spectrometer (Sentinel-4) | Proposed
| Supporting atmospheric composition and air quality monitoring services. | High-resolution nadir-scanning SW spectrometer | |
HiRDLS
High Resolution Dynamics Limb Sounder | No longer operational
| Measures atmospheric temperature, concentrations of ozone, water vapour, methane, NOx, N2O, CFCs and other minor species, aerosol concentration, location of polar stratospheric clouds and cloud tops. Currently not collecting data on Aqua. | Limb-scanning IR spectrometer | |