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WP-3D Instrumentation

Parameter Time Resolution MethodDet. Limit
Ozone (O3) 10 s UV Absorption 1 ppb
Fast O3 1 s NO/O3 Chemiluminescence 0.2 ppb
Fast CO (FCO) 1 s VUV Resonance Fluorescence 1 ppb
Carbon Dioxide (CO2) < 1 s NDIR 0.2 ppm
Sulfur Dioxide (SO2) 2 s UV Pulsed Fluorescence 1 ppb
Nitric Oxide (NO) 1 s NO/O3 Chemiluminescence 30 ppt
Nitrogen Dioxide (NO2) 3 s Photolysis, NO/O3 Chem. 100 ppt
Total Nitrogen Oxides (NOy) 1 s Au Converter, NO/O3 Chem. 50 ppt
PAN 1 s / every 6 min Dir. Injection, GC/ECD < 5 ppt
PPN 1 s / every 6 min Dir. Injection, GC/ECD < 5 ppt
MPAN 1 s /every 6 min Dir. Injection, GC/ECD < 5 ppt
Nitric Acid (HNO3) 1 s C I Mass Spectrometry 10 ppt
NH3 5 s C I Mass Spectrometry 50 ppt
In-situ VOCs 1 min./every 15 min Cryo Collection, GC/FID < 10 ppt
Canister VOCs < 1 min. Canister Sampling, GC/MS < 10 ppt
CH2O Liquid Chromatography
Peroxides (incl. H2O2) 1 min Dual Enzymatic / Fluorimeter 30 ppt
Aerosol size distribution 1 s NMASS 5 - 90 nm
Aerosol size distribution 1 s ERAST 70 - 1000 nm
Total Radiation 1 s Eppley Pyranometers - Zenith & Nadir 0.28 - 2.8 µ
UV Radiation ~10 s Spectral Radiometer - Zenith & Nadir 295 - 480 nm
Visible Radiation Visible Absorption Spectrometer 420 - 700 nm
Water Vapor (H2O) 1 s Lyman Alpha Absorption
Air Temperature 1 s Platinum Thermistor
Dewpoint/Frostpoint < 3 s Chilled Mirror
Wind Speed 1 s Derived from INE
Wind Direction 1 s Derived from INE
Altitude 1 s Barometric
Position 1 s GPS, INE
Air Speed 1 s Barometric
Biometer 3-wavelength IR Absorption
Atmospheric Reflectivity C & X Band Radars