# README_PRECIP2021_Radiosonde_Data ## Quality-Controlled (QCed) Upper-air Radiosonde Dataset > [time=Sep 16, 2021] --- ### Introduction: The QCed upper-air radiosonde dataset for PRECIP-2021 field campaign includes the data from the following radiosonde instruments during 5/1 to 8/19, 1. 52 Vaisala RS41-SGP upper-air sounding (50 co-launched with Storm Tracker; 2 solo). 2. 56 Storm Tracker upper-air sounding (50 co-launched with Vaisala RS41-SGP; 5 co-launched with iMET4; 1 solo). ### Dataset Naming Convention: For each individual soudning (Vaisala RS41-SGP or Storm Tracker), the following levels of data will be generated, * Level 0 (L0) - raw, original data, native resolution (usually 1Hz) * Level 1 (L1) - data from all sites and instrument in a uniform, digital, easily readable format (native resolution) * Level 2 (L2) - processed with automated QC checks (ASPEN) to remove bad data (native resolution) * Level 3 (L3) - corrected (if possible and necessary; native resolution) * Level 4 (L4) - uniform vertical resolution (with QC flags if possible) * L4u - uncorrected L4 version based on L2 data * L4c - corrected L4 version based on L3 data For example, the data in the directory "L1_csv" are the Level 1 data in csv format. ### Current Process: The QCed upper-air radiosonde dataset for PRECIP-2021 field campaign has been generated to Level 2. The current available file formats in each level include, * Level 0 (L0) - ascii (csv or txt) format * Level 1 (L1) - csv format * Level 2 (L2) - csv, eol, and netcdf format (png files are the skew-T diagrams generated by ASPEN) ### Reference: [Developing High-Quality Field Program Sounding Datasets](https://archive.eol.ucar.edu/projects/sondeqc/) ### Contact: > [name=Hungjui Yu (hungjui@rams.colostate.edu)] ###### tags: `PRECIP-2021` `Storm Tracker` `Documentation`