RIALTO

Routine Inflight Assessment of Lower Tropospheric Oxidants

CAST OF PLAYERS

Gerd HoenningerWes KobelkaJim ArnoldJohnny LaiStoyka NetchevaJohn Dalziel

Jan Bottenheim

“DO YOU HAVE DATA?”

(Keith Puckett, October 25 2004)

RIALTO FLIGHT OCTOBER 24 2004

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RIALTO FLIGHT OCTOBER 23 2004

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Nose cone2B lampAmbient

miniature, low power/low volume instrument package no compromise in data quality, no lower grade instrumentation must operate in fully automated mode installation in small aircraft already in service

RIALTO, concept

2B:• temperature sensitivity is a problem, currently work in progress to ameliorate the problem (appears in part due to temperature sensitive voltage regulators

PROBLEM MORE SERIOUS THAN INITIALLY EXPECTED. ONGOING

• on board ozone source to be added for inflight test of operation

DONE

• data storage on PC104+ system

DONE

ISSUES LAST YEAR

DOAS:

• 2 optical windows; these windows will connect to 2 small lenses inside the nose cone and the light will be transmitted to the 2 spectrometers using quartz fibers; icing precautions still to be addressed

DONE• 2 MiniDOAS devices to be installed in nose cone

DONE• 1 PC104+ system for data acquisition and storage. Flash disks will be used for data storage and backup.

DONE• small sealed lead gel battery will be used to guarantee safe shutdown without data loss

DONE• system can start automatically when aircraft power is switched on

OPERATIONAL• it will be attempted to have zentih and horizontal viewing direction instead of zenith and nadir. To determine the feasability some general data or statistics on flight altitudes will be used.

CHANGED TO TWO ANGLES HORIZONTAL (SIDEWAYS) AT 100 DIFFERENCE

Other:

• position, temperature, pressure, from avionics systemLOGGING AIRCRAFT GPS DATA FOR TIME, POSITION, AND

ALTITUDE• room for potential other parameters: CO? CO2? aerosol? Suggestions please!

NOT ATTEMPTED• all data to be collected on flash card; reader to be installed in cockpit; all other parts in nose-cone

DONE• fully automated operation using 28 VDC from aircraft

DONE

RIALTO flight, August 18, 2004

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RIALTO flights, August 7, 2004

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RIALTO flights, October 3/4, 2004

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• text

1. 2B:slow startinginflight zero/span check not implementedtemperature and pressure problems, not related to spectroscopy

2. DOAS: no spectra analyzed to date due to cooling problems

3. Humidity sensor: not working until now (replaced October 14)

4. Communications from aircraft GPS: unreliable serial connection

5. Overheating of nosecone

6. Weight of total package too high: frequently package removed from the plane

RIALTO flights, August 7 2004

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2B CellNosecone2B-EbayAmbientGP Time vs GP ALT

RIALTO flight, August 24, 2004

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2B cell ambientnose cone2B lamp

RIALTO NEXT STEPS

2B, major overhaullamp stabilitypreheating of lamp housingfast data logging

Complete redesign of packagingcompacterbetter temperature controlreduced weight

Data analysis softwareimprovements to SPIdata archiving (MS Access?)

$$$$$$$$OK until end FY pending PAL compensationPDF when Gerd leaves?