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SP1 Instrumentation

High-resolution imaging HSI (High Speed Imager) probe interior rear

SP3 Spaceborne Observation & Nowcasting of High IWC regions

This image describes the RDT with its different attributes: lightning activity, cloud-top height, morphological attributes. The level "base of tower" is used for tracking. The second level "top of tower" provides an additional morphological description.

This image describes the first tests of the advection-scheme of RDT with Japanese satellite MTSAT. For each cell, one can see the past trajectory, the position corresponding to the satellite image and the future position of the cell (up to on hour).

This image describes a recent development implemented in v2013 release of RDT : the Overshooting Tops (OT) Detection (domelike protrusion above the cumulonimbus anvil). Positions of OT are indicated in green while the gauge indicates OT properties.

Real-time monitoring of deep tropical convection using MSG infra-red channels

The convective cells detected by RDT on the 23 January 2014 at 2010UTC corresponding to the period just before flight 06 take off are drawn in red contours over MTSAT enhanced infrared satellite image (10.8um) . The trajectory of the flight is plotted as a with line with the position of the aircraft at take-off as a big red dot. The corresponding in-situ measurements of total water content (averaged over 1minute) are represented as dots along the trajectory (white: low , yellow: medium , orange: high).

The convective cells detected by RDT on the 29 January 2014 at 2030UTC corresponding to the period just before flight 10 take off are drawn in red contours over MTSAT enhanced infrared satellite image (10.8um) . The trajectory of the flight is plotted as a white line with the position of the aircraft at take-off as a big red dot. The corresponding in-situ measurements of total water content (averaged over 1minute) are represented as dots along the trajectory (white: low , yellow: medium , orange: high).

The convective cells detected by RDT on the 2 February 2014 at 2030UTC corresponding to the period just before flight 12 take off are drawn in red contours over MTSAT enhanced infrared satellite image (10.8um) . The trajectory of the flight is plotted as a white line with the position of the aircraft at take-off as a big red dot. The corresponding in-situ measurements of total water content (averaged over 1minute) are represented as dots along the trajectory (white: low , yellow: medium , orange: high).

Example of concurrent observations from A-Train and SEVIRI observations with (a) RDT contours, (b-e) POLDER radiance and products, (f) AMSRE 89 GHz brightness temperature, (g) IWC profiles as provided by the DARDAR product along the solid black line plotted in panel (f), and (i-m) high IWC mask at different times for the region located within the yellow square in (b). (h) presents the location of the region plotted in (i-m).

The convective cells detected by RDT on the 29 May 2015 at 0845 UTC corresponding to the period preceding takeoff of the last flight of the 2nd HAIC/HIWC field campaign (Cayenne, 2015) are drawn in red contours over MSG enhanced infrared satellite image (10.8 µm) . The trajectory of the flight is plotted as a white line with the position of the aircraft at take-off as a big brown dot. The corresponding in-situ measurements of total water content (averaged over 1minute) are represented as dots along the trajectory (white: low; yellow: medium; orange: high; red: very high).

Overlay of the A340 flight track on map of the HIM-CCP cloud top temperatures at 07:40 UTC during the 1st HAIC-2016 flight in Darwin (13 January 2016). Cloud regions with high IWC identified from KNMI high IWC mask and RDT are contoured in white and blue respectively. The temporal evolution of the (preliminary) Total Water Content (TWC) measured by the ROBUST at the A340 location is plotted in the upper right panel. The TWC is also plotted in colour along the A340 track (same colours as in the upper right panel). Finally the thin black line plotted along the A340 track indicates the location of the plane during the 10-min HIMAWARI revisiting period.

SP4 High IWC Detection and Awareness Technology

Testing of the NRC particle detection probe

SEA LWC probe on the nose of the Falcon-20 during the CAYENNE campaign, May 2015

NRC probe on the NRC CONVAIR Research Aircraft during the CAYENNE campaign, May 2015

NRC probe on the NRC CONVAIR Research Aircraft during the CAYENNE campaign, May 2015

NRC CONVAIR Research Aircraft during the CAYENNE campaign, May 2015

SP5 High IWC Test Capability enhancement

Typical wind tunnel ice particles produced by the ice grinding method

Typical ice accretion on an aerofoil generated by supercooled liquid water droplets only (no ice particles).

Typical particle trajectories down a tunnel contraction section and into the tunnel working section. Used to assess velocities and temperatures of particles.

GKN Icing Wind Tunnel HAIC Activities

SP6 High IWC Tools and Simulation Development

Fragmentation at impact

Icore for impact experiments

Liquid sphere containing ice

This high magnification image shows exemplary ice particles being used in the impact experiments.The experiments have been conducted by Dipl.-Ing. Tobias Hauk in collaboration with TU Darmstadt (Prof. Dr.-Ing. Cameron Tropea)

The sequence of 6 high-speed camera pictures shows a medium velocity impact (v > 50m/s) of an ice crystal of interest (two dimensions < 200µm) on a cold metallic surface. The angle of impact is 90°and the static temperature is -11°C. The experiments have been conducted by Dipl.-Ing. Tobias Hauk in collaboration with TU Darmstadt (Prof. Dr.-Ing. Cameron Tropea)

This short sequence shows the result of a small feasibility study which should investigate if top view high-speed videos using very high frame rates and very low shutter times (< 1µs) are feasible. A polycarbonate plate has been used.The experiments have been conducted by Dipl.-Ing. Tobias Hauk in collaboration with TU Darmstadt (Prof. Dr.-Ing. Cameron Tropea)

This sequence of 4 high-speed camera images shows a "lucky shot" in which an ice crystal hits a water droplet.The experiments have been conducted by Dipl.-Ing. Tobias Hauk in collaboration with TU Darmstadt (Prof. Dr.-Ing. Cameron Tropea)

Ice shapes issued from the NRC crown cylinder experiments. Influence of the melt ratio on the ice accretion thickness - Continuous line: ONERA 2D code result – Red dashed line: experimental ice thickness at the leading edge – Red circles: experimental ice shape.

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