| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
ABI
Advanced Baseline Imager | Operational
| Detects clouds, cloud properties, water vapour, land and sea surface temperatures, dust, aerosols, volcanic ash, fires, total ozone, snow and ice cover, vegetation index. | n/a |  |
CERES
Cloud and the Earth's Radiant Energy System | Operational
| Long term measurement of the Earth's radiation budget and atmospheric radiation from the top of the atmosphere to the surface; provision of an accurate and self-consistent cloud and radiation database. | n/a | |
CLARA
Compact Lightweight Absolute Radiometer | Operational
| CLARA is a scientific instrument that will be used to determine the total solar irradiance of the Sun. | n/a | |
ERM-2
Improved Earth Radiation Measurement | Operational
| Measures Earth radiation gains and losses on regional, zonal and global scales. | n/a | |
GOME-2
Global Ozone Monitoring Experiment - 2 | Operational
| Measurement of total column amounts and stratospheric and tropospheric profiles of ozone. Also amounts of H20, NO2, OClO, BrO, SO2 and HCHO. | n/a | |
SIM-2
Solar Irradiation Monitor-2 | Operational
| Solar irradiance monitoring. | n/a | |
TSIS-1/SIM
Total Solar and Spectral Irradiance Sensor 1 - Spectral Irradiance Monitor | Operational
+/-0.2 % | Measures solar spectral irradiance in the 0.2 - 2 µm range. | n/a | |
TSIS-1/TIM
Total Solar and Spectral Irradiance Sensor 1 - Total Irradiance Monitor | Operational
+/-0.035 % | Measurement of total solar irradiance directly traceable to SI units with an absolute accuracy of 0.035% and relative accuracy of 0.002% per year. | n/a | |
TSIS-2/SIM
Total Solar and Spectral Irradiance Sensor 2 - Spectral Irradiance Monitor | Being developed
+/-0.5 % | Measures spectral solar irradiance over three bands ranging from 200 to 2400 nm. | n/a | |
TSIS-2/TIM
Total Solar and Spectral Irradiance Sensor 2 - Total Irradiance Monitor | Being developed
+/-0.02 % | Measures total solar irradiance over the full spectrum. | n/a | |