UAS-based low-altitude freezing precipitation observation system: development updates and initial field deployment results

This dataset supports the extended abstract submitted to the 24th ARAM Conference at the 2024 AMS Annual Meeting. The data was collected on APR/14/2023 at Marshall Field (CO). It presents weather data from ground-based sensors and an  Unmanned Aerial Weather Measurement System (WxUAS).

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- WxUASParticleSizeDistribution - This folder has the four files for the WxUAS particle size distribution profiles. This data was collected with an AlphaSense OPC-N3. In the particle size distribution profiles, the data represents the distribution’s mode – the particle size bin with the highest count is the distribution’s total count at a given altitude above ground. 

- WxUASTempRelHumidity - This folder has the four files for the WxUAS temperature and relative humidity profiles. This data was collected using three PT-100 thermistors and 2 IST HYT-271 hygrometers.
- - The files with the prefix "QCedData" have the Quality controlled data averaged from 10 Hz to 1 Hz and averaged between the three thermistors for temperature) and 2 hygrometers (for relative humidity). The file has the data timestamp (from the aircraft GPS), the Altitude above ground level, temperature, and relative humidity.
- - The files with the prefix "BinnedFilteredQCedData" present the same data as the "QCedData" files after a window filter and an altitude binning algorithm.

- Ceilometer - Has the altitudes of cloud bases 1, 2, and 3 from Marshall Field's ground-based Vaisala CL31 at 2 Hz.

- Distrometer - Has the precipitation type and particle count per minute from Marshall Field's ground-based OTT Parsival every minute.

- TowerDataMission#" - These files have the temperature, relative humidity, and precipitation values from Marshall Field's instrumented tower for each flight period.