2nd HAIC/HIWC International field campaign in Cayenne, French Guyana from 9 – 29 May, 2015

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The 2nd HAIC/HIWC (High Ice Water Content – Project led by NASA) International field campaign took place in Cayenne, French Guyana from 9 – 29 May, 2015. As the objective to provide 99th percentile total water content statistics, as a function of distance scale, was not reached for at least two flights levels during the 1st HAIC/HIWC International field campaign held last year in Darwin, Australia, the decision was made to perform a second campaign so as to complete the database.

The Cayenne 2015 campaign is supported by the HAIC, EASA-HighIWC and HIWC projects with the additional support of ICC. The main purpose of this campaign was to complete the database and achieve rulemaking objectives to provide the first modern extensive data set of the core areas of deep convection that can be safely penetrated. In particular, the flight test aimed at collecting cloud data in deep convective clouds so as to fulfill the industry and scientific objectives, as outlined in the HIWC Science Plan and the HAIC Description of Work.

Towards the aforementioned objectives, a 3-week field campaign was conducted out of Cayenne, French Guyana to collect data in deep convective clouds with the primary objective to provide 99th percentile total water content statistics, as a function of distance scale, to industry and regulators. Three different aircraft types were involved in this flight test campaign:

  • the SAFIRE Falcon 20 aircraft equipped with active remote sensing (airborne Doppler cloud radar) and in situ microphysics probes to sample -50°C/-10°C Flight Level,
  • the NRC Convair 580 aircraft equipped with active remote sensing (airborne Doppler cloud radar) and in situ microphysics probes to sample -10°C Flight Level and vicinity of clouds, and
  • the Honeywell B757 aircraft equipped with enhanced weather radar to validate radar ice crystals awareness function thanks to other A/C in-situ measurements

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Also, satellite, ground-based radar and lightning networks, and weather models to determine test areas and to support post-test data analysis were used.

 

The field campaign was the result of an international collaboration between the HAIC and HIWC projects, with the funding support of the European Union's Seventh Framework Programme (FP7/2007-2013), EASA and FAA, and involves necessary expertise in a wide range of skills (airframers, engine manufacturers, equipment & systems suppliers, research institutes and academics, meteorological services and SME’s able to provide specific knowledge, service, or support in specific areas) and the main stakeholders in the field. Many data were collected, which are currently post-treated and analyzed, and will consolidate the existing knowledge of atmospheric icing environment.

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