Table 1. Instrument Payload on Board the CIRPAS Twin Ottera in GoMACCS


Instrument										Datab
Condensation particle counter (CPC)							aerosol number concentration (CPC 3025, >3 nm; CPC 3010, >10 nm, dry)
Counterflow virtual impactor (CVI)							virtual impactor for isolating cloud droplets (cut size of 10 mum +/- 20%)
Dual automated classified aerosol detector (DACAD)					submicrometer aerosol size distribution (10.3–828 nm, 85 bins) at two RHs (dry and wet)
Passive cavity aerosol spectrometer probe (PCASP), forward scattering spectrometer probe (FSSP), cloud/aerosol/precipitation spectrometer (CAPS consists of cloud and aerosol spectrometer (CAS) and cloud imaging probe (CIP)), phase Doppler interferometer (PDI [Chuang et al., 2008])	aerosol/cloud/precipitation droplet size distribution: PCASP (0.1–2.6 mum, dry), FSSPc (2.55–42.7 mum, 19 bins), CASc,d (0.54–62 mum, 20 bins), CIPc (40.45 mum–1.56 mm, 61 bins), PDIc,e (2.07–200 mum, 127 bins)
Time-of-flight Aerodyne aerosol mass spectrometer (TOF-AMS)				nonrefractory aerosol chemistry
Particle-into-liquid sampler/ion chromatography (PILS-IC [Sorooshian et al., 2006])	submicrometer water-soluble aerosol chemistry (inorganic and organic acid ions)
Solar spectral flux radiometer (SSFR [Pilewskie et al., 2003])				upwelling and downwelling radiative fluxes above and below cloud
Particle soot absorption photometer (PSAP), photoacoustic spectrometer, CO2		soot absorption (multiwavelength/incandescence)
Navigational/meteorology probes and Gerber liquid water content probe (PVM-100A [Gerber et al., 1994]), hotwire LWC probe	navigational data, temperature, dew point, RH, pressure, liquid water content, wind direction/speed, updraft velocity, etc.
Cloud condensation nuclei counter (CCN [Roberts and Nenes, 2005])			CCN at different supersaturations
Multiangle light scattering spectrometer (MLS)						shape and angular dependence of light scattering of individual particles

aAircraft flight speed of ~50 m s­1.
bAll sizes are in diameter.
cFirst bin has been omitted.
dCAS data were available before 2 September.
ePDI data were undergoing calibration at the time of writing.