B2SAP Instruments

Small meteorological balloons carry a combined payload:

Frost Point Hygrometer (FPH)water vaporNOAA GML
Electrochemical Concentration Cell (ECC)ozoneNOAA GML
Portable Optical Particle Spectrometer (POPS)aerosol number and size distributionNOAA CSL
Radiosondetemperature, pressure, horizontal winds and balloon location (GPS)NOAA GML

Additional payload instrument included during periods of increased stratospheric aerosol loading:

miniature sunphotometeraerosol optical depthNOAA CSL