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Global Hawk
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Fast Cloud Droplet Probe

SPEC has developed a Fast Cloud Droplet Probe (FCDP) with state-of-the-art electro-optics and electronics that utilizes forward scattering to determine cloud droplet distributions and concentrations in the range of 1.5 to 50 microns.  Though designed for cloud droplet measurements, the probe has also shown reliable measurements in ice clouds.  The new electronics include a temperature controlled fiber-coupled laser, FSSP-300 optics with pinhole limiting depth of field (Lance et al. 2010), a field programmable gate array (FPGA), 40 MHz analog-to-digital-converter (ADC) sampling, custom amplifiers, a very small and low power Linux based 400 MHz processor and a 16-Gigabyte flash drive that stores data at the probe.

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Laser Induced Fluorescence – Sulfur Dioxide

The LIF-SO2 instrument detects sulfur dioxide at the single-part per trillion (ppt) level using red-shifted laser-induced fluorescence. It has operated on the WB-57 and Global Hawk aircraft in the UT/LS, as well as on the DC-8. Sulfur Dioxide is an important precursor for aerosols including nucleation of new particles globally and can be greatly enhanced in the stratosphere following explosive volcanic eruptions. An important implication of the Asian Monsoon is transport of aerosol precursors including SO2 into the lower stratosphere.

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GHOST Engineers (Neil Humpage, Andy Vick) test instrument (2.20.15)

MMS Nav data wiring change (2.19.15)

GHOST PIs fill LN2 prior to outdoor testing (2.18.15)

AIITS Pod final installation (2.18.15)

CAST hangar testing concludes (2.17.15)

GHOST Cryostat install after LN2 fill (2.17.15)

Nick Krause performing Hawkeye data system checkout (2.13.15)

MTP (Dick Denning and Prashanth Pandian) during Outdoor Satcom Testing (2.13.15)


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