FCDP status update for ATTREX2013 B. Gandrud, R. P. Lawson, Nick Krause, S. Lance, S. Woods, Pat Zmarzly, and Chris Roden.

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Presentation transcript:

FCDP status update for ATTREX2013 B. Gandrud, R. P. Lawson, Nick Krause, S. Lance, S. Woods, Pat Zmarzly, and Chris Roden

Global Hawk payload locations -FCDP mounted below the Bay 25 lower surface

Fast Cloud Droplet Probe (FCDP) -count & size based on forward scattering -design to eliminate/reduce shattering -1 to 50 µ diameter w/ oversize -modern high speed electronics w/ pbp

Data Status R0 data submitted w/ constant TAS=170 m/s Post-mission size calibrations agree w/ pre- mission R1 data using MMS TAS reprocessed Need to edit R1 data for periods w/ no MMS TAS

FCDP data summary Operational on all 6 science flights Cloud particles observed for short periods on all flights usually during vertical profiles 5 of 6 flights show cirrus concentrations >1000 L -1 in thin layers 6 of 6 flights show cirrus concentrations in the L -1 range over larger extent

data flight examples low concentrations throughout flight but thin cloud during 2 nd vertical profile

SF Nine individual clouds observed on this flight

addition of Hawkeye probe to GH Measurement of larger sizes than FCDP, out to 6.4 mm Imaging rather than scattering gives better understanding of morphology & habit High definition images of particles

Global Hawk mounting locations

Integration of Hawkeye on GH original proposal for just Hawkeye probe but GH engineering not completed so fall-back to just FCDP for 2011 mission Fall 2012 testing on GH strongback damaged components so no Hawkeye integration May 2013 FRR approved but installation couldn’t meet bolt tension requirement, no Hawkeye integration July 2013 Hawkeye installed but load cell broke, further installation delayed for HS3 mission October 2013 scheduled but govt shutdown Next attempt Nov ?????

Outlook -finish processing of 2013 R1 data at one second -select processing at 20Hz for high time resolution events -modeling to evaluate the impact of flight results on radiation budget & stratospheric humidity -mount SPEC Hawkeye imaging probe under GH wing by end of year ? -ATTREX flights from Guam, January 2014

Acknowledgements: -SPEC Inc. grant funding from NASA Radiation Science Program -NASA Dryden Aircraft Operations Facility -Global Hawk ground and flight crews -ESPO at NASA Ames Research Center -and all of the science participants