Instrument : Particle Soot Absorption Photometer (PSAP)

Instrument Categories

A particle soot absorption photometer collects aerosol particles on a substrate and measures the change in light transmission relative to a reference filter. Bulk particle absorption is derived after correcting for scattering effects.

The PSAP is part of the Aerosol Observing System (AOS).

Output Datastreams

  • aospsap3w : AOS: 3 wavelength Particle Soot Absorption Photometer

Primary Measurements

The following measurements are those considered scientifically relevant.


Eastern North Atlantic
ENAC1 Browse Data Browse PlotsGraciosa Island, Azores, Portugal
North Slope Alaska
NSAX1 Browse Data Browse PlotsExternal Data (satellites and others)
Southern Great Plains
SGPC1 Browse Data Browse PlotsCentral Facility, Lamont, OK
ARM Mobile Facility
ACXM1 Browse Data Browse PlotsOff the Coast of California - NOAA Ship Ronald H. Brown; AMF2
MAGM1 Browse Data Browse PlotsLos Angeles, CA to Honolulu, HI - container ship Horizon Spirit; AMF2 retired
MAOM1 Browse Data Browse PlotsManacapuru, Amazonas, Brazil; AMF1
PGHM1 Browse Data Browse PlotsARIES Observatory, Nainital, Uttarkhand, India retired
PVCM1 Browse DataHighland Center, Cape Cod MA; AMF 1
SBSS2 Browse DataSteamboat Springs CO, Christie Peak retired
TMPS1 Browse Data Browse PlotsU. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AOS
 retired = Originating instrument has been retired at this location

See Also


Anne Jefferson
(303) 497-6493

Stephen Springston
Brookhaven National Laboratory
(631) 344-4477

Arthur Sedlacek
Brookhaven National Laboratory
(631) 344-2404

Cynthia Salwen
Brookhaven National Laboratory