1. HAIS Fast-Response O 3 Instrument Basic operating principle:Basic operating principle: –NO chemiluminescence Operating conditions:Operating conditions: Performance specifications:Performance specifications: * S/N = (signal-background)/2(background) 1/2 † Detection limit = 2(Background) 1/2 /sensitivity Sample flow (sccm, cm 3 /min at 0 o C, 1 atm)500 Reaction Vessel Pressure (torr)10 Reaction Vessel Temperature ( o C)35 Pure NO flow (sccm)4 Plug flow “Flush” frequency (Hz)42 1-Hz5-Hz Background counts per ∆t25050 Sensitivity, counts per ∆t per ppbv2000400 Signal/Noise * (S/N) at 20 ppbv O 3 1257562 Signal/Noise * (S/N) at 100 ppbv O 3 63172825 Detection Limit † (ppbv)0.020.04

2. Carbon Monoxide Instrument Basic operating principle:Basic operating principle: –Aero-Laser VUV resonance fluorescence Operating conditions:Operating conditions: Performance specifications:Performance specifications: Sample flow (sccm)150 Reaction Vessel Pressure (torr)10 Source wavelength (+/- 5 nm)151 Optical filter N 2 purge rate (sccm)20 Frequency response (Hz)0.5 Accuracy at 100 ppbv CO (ppbv)5-10 Detection Limit (ppbv)3 Linear range (ppbv)3-10,000

3. Status Overview:Overview: –Fabrication complete –Lab and flight tests for sensitivity and frequency response –During HEFT 08 preparation and research flights –Two inlet configurations will be evaluated for best time response during HEFT –Instrument will require periodic absolute calibrations on ground between flights Integrated with other measurements:Integrated with other measurements: –Vacuum pump shared between O3, CO, and NO/NOy –Data system shared between O3, NO, and NOy –One operator for all 4 measurements

4. Fast-O3/CO Rack NO Containment Vessel HAIS fast-O3 instrument 21.5 lbs 26 lbs

5. MayComm Open-Path Laser Hygrometer Principle: Dual beam near IR laser absorption Range: 2 to ~40,000 ppmv Sampling Rate: 1 – 20 Hz Operation mode: autonomous Calibration: Kahn/Michell DCS-80 Dewpoint Generation: Temperature- and pressure-controlled saturator and dilution system Reference Hygrometer: Range: -75 to +20 dewpoint Accuracy: +/- 0.2ºC