Small meteorological balloons carry a combined payload:
| Instrument | Measurement | Institution |
|---|---|---|
| Frost Point Hygrometer (FPH) | water vapor | NOAA GML |
| Electrochemical Concentration Cell (ECC) | ozone | NOAA GML |
| Portable Optical Particle Spectrometer (POPS) | aerosol number and size distribution | NOAA CSL |
| Radiosonde | temperature, pressure, horizontal winds and balloon location (GPS) | NOAA GML |
Additional payload instrument included during periods of increased stratospheric aerosol loading:
| miniature sunphotometer | aerosol optical depth | NOAA CSL |