- ESA FRM program - European Space Agency Fiducial Reference Measurements program
- FRM - Fiducial Reference Measurements
- TCCON - Total Carbon Column Observing Network
- NDACC - Network for the Detection of Atmospheric Composition Change
- NDACC-IRWG - Network for the Detection of Atmospheric Composition Change - Infrared Working Group
- FRM4DOAS - Fiducial Reference Measurements for Ground-Based DOAS Air-Quality Observations
- CINDI-2 - Cabauw Intercomparison of Nitrogen Dioxide Measuring Instruments 2
- ESA - European Space Agency
Fiducial Reference Measurements for GreenHouse Gases
