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Instrument

HVPS
High Volume Precipitation Spectrometer

The High Volume Particle Sampler, also known as the High Volume Precipitation Spectrometer (HVPS), measures particle size distributions and obtains particle images in the size range of about 0.1 cm to 6 cm. It is an open-path instrument located on the outside of the aircraft, typically below the wing. A laser sheet throws a shadowgraph image of the hydrometeor (cloud droplets or ice crystals) in the sample volume on a photodiode array. As the hydrometeor moves through the sample volume, this optical array records the moving shape and a two-dimensional picture can be recorded. At an air speed of 100 m/s, the sample volume is 310 l/s. The recorded images can be analyzed for size distributions, number concentrations, and further cloud properties detailed below. Hydrometeors in the range of 0.3−19.2 mm can be fully recorded at a 150 μm resolution; larger particles can only be sized along the direction of flight. In order to keep the pixel resolution along the flight path constant, the system clock frequency is adjusted according to the detected True Air Speed (TAS) by the data system itself. The maximum clock frequency for the HVPS is 240 kHz. The HVPS data recorded during this project has 400 m m resolution along the flight path.

Instrument Details

Spectrometer/Radiometer
CLOUDS, ATMOSPHERE, CLOUD MICROPHYSICS, PARTICLE SIZE DISTRIBUTION, CLOUDS, ATMOSPHERE, CLOUD MICROPHYSICS, CLOUD LIQUID WATER/ICE, CLOUDS, ATMOSPHERE, CLOUD MICROPHYSICS, CLOUD DROPLET CONCENTRATION/SIZE
Troposphere
310 L/s
1.92 cm
240 kHz
External Linkhttps://petapicovoltron.com/software/hvps-configuration-and-calibration/default-and-manual-calibration/
MACPEX

Mid-latitude Airborne Cirrus Properties Experiment

2011
Central United States, based out of Ellington, Texas
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1 Deployment
· 0 Data Products
CRYSTAL-FACE

Cirrus Regional Study of Tropical Anvils and Cirrus Layers Florida Area Cirrus Experiment

2002
Southern Florida
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1 Deployment
· 1 Data Product
CRYSTAL-FACE

Cirrus Regional Study of Tropical Anvils and Cirrus Layers Florida Area Cirrus Experiment

2002
Southern Florida
view all deployment dates
1 Deployment
· 1 Data Product

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