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Participating organization(s) shown in parentheses.- In Situ Measurements of Aerosol Optical Properties (NOAA ESRL)
- Lidar at Mauna Loa, Hawaii (NOAA ESRL)
- Lidar at Boulder, Colorado (NOAA ESRL)
- Lidar at Pago Pago, American Samoa (NOAA ESRL)
- Lidar at Trinidad Head, California (NOAA ESRL / MPLNET)
- CLidar (CCD Camera Lidar) (NOAA ESRL / CCSU)
- Radon-222 Monitoring (ANSTO)
- Global Atmosphere Passive Sampling (GAPS) Network (EC)
- Aerosol Light Absorption Aethalometer (EPA)
- Elemental, Particulate, and Reactive Gaseous Mercury Monitoring (EPA)
- Dichotomous Partisol Measurements (EPA)
- Sequential Fine Particle Sampler (EPA)
- IMPROVE (Interagency Monitoring of Protected Visual Environments) (UC-Davis)
- AERONET (Aerosol Robotic Network) (NASA)
- upcoming Chemical and Isotopic Studies of Atmospheric Aerosol Sources, Transport and Evolution (UC-San Diego)
- Measurements of Free Tropospheric Nitric Acid and Aerosols (UH-Manoa)
- Comparison of Aerosol Organic Carbon Measurements and Models in the Free Troposphere (UH-Manoa)
- Lidar: Stratospheric Ozone, Temperature, and Aerosol Profiles (NDACC / NASA JPL)
- WMO Precision Filter Radiometer (PMOD WRC)
- retired Relationships Between Mineral Dust and Radionuclides from Historical Nuclear Weapons Tests (NMSU)
- retired 4 Wavelength Nephelometer (NOAA ESRL)
- retired Aerosol Aethalometer (NOAA ESRL)
- retired Ion Exchange Column (DHS / USDE)
- retired Radio Nuclide Program (DHS / USDE)
- retired Variability in Accretion Rate of Interplanetary Dust Using 3He as Tracer (NASA/ Cal-Tech)
- retired Pollak Condensation Nuclei Counter (CNC) (NOAA ESRL)
- retired Solar Turbidity (NOAA ESRL)
- retired VOGNET (NOAA ESRL / OAR / DOE / HPA)