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CSU CHILL National Radar Facility CSU CHILL National Radar Facility About the CSU-CHILL Radar Educational Activities Dual-wavelength antenna About the CSU-CHILL Radar The CSU-CHILL National Weather Radar Facility, located in Greeley, CO, is an Educational Activities Dual-wavelength antenna The facility is an integral element of engineering and atmospheric science programs at CSU The CSU-CHILL National Weather Radar Facility, located in Greeley, CO, is an advanced, transportable dual-polarized S-band weather radar system. The facility is The facility is an integral element of engineering and atmospheric science programs at CSU and institutions nationwide. Research Activities The CSU-CHILL radar features a unique dual offset-feed antenna with dual- wavelength capability funded by the National Science Foundation and Colorado State University, and is hosted by the Departments of Atmospheric Science and Electrical and Computer Research Activities • Advanced signal processing techniques Features • Three feed horn options available (Dual wavelength, 10 cm and 3 cm) Engineering. Features • Radar hardware research and design • Advanced polarimetric rainfall analysis • Three feed horn options available (Dual wavelength, 10 cm and 3 cm) • Beam width of 1.0 degree at 10 cm (S-band), 0.3 degree at 3 cm (X-band) • Symmetric OMT design, LDR limit exceeds 40 dB (S-band) Features • Dual offset, dual-wavelength low sidelobe Gregorian antenna system • • Advanced polarimetric rainfall analysis • Automated hydrometeor identification algorithms Classroom Activities • Symmetric OMT design, LDR limit exceeds 40 dB (S-band) • Low sidelobe levels improve clutter rejection at low elevation sweeps • Flexible antenna controller supports sector scans and RHIs • Easy-to-use, remotely accessible radar control interface • Polarization-agile dual-Klystron 1 MW transmitter at S-band Classroom Activities • A rich collection of radar data in support of classroom activities • Tutorials with guided interpretations of polarimetric radar cases REU Sphere Cal • Flexible antenna controller supports sector scans and RHIs • Protected by air-supported radome • Simultaneous-transmit 25 kW Magnetron transmitter at X-band • Dual-channel software-defined digital-IF receiver • Tutorials with guided interpretations of polarimetric radar cases • Short courses which integrate the CSU-CHILL Facility REU Sphere Cal • Flexible signal processor, customizable to project needs • Comprehensive calibration subsystem Virtual Radar Tours • Internet streaming video from multiple on-site cameras • Comprehensive calibration subsystem • VCHILL Real-time control and distribution of radar data • Dual-doppler capability with CSU-Pawnee S-band radar • Internet streaming video from multiple on-site cameras • Close-up views of the antenna structure • Walk-around of the transmitter/receiver subsystems • Dual-doppler capability with CSU-Pawnee S-band radar User Access • Walk-around of the transmitter/receiver subsystems • Remote presentation via video by CSU-CHILL staff Research Experience for Undergraduates • NSF-funded projects reviewed by Observing Facilities Allocation Panel (OFAP) • Cost-recovery non-NSF projects, also reviewed by OFAP Research Experience for Undergraduates • Hands-on experience with radar hardware and operations • Cost-recovery non-NSF projects, also reviewed by OFAP • Small scale “20-hour” projects, conducted at Greeley • Live virtual tours of the radar facility • Hands-on experience with radar hardware and operations • Individual mentoring by facility staff • Majors in Physics, Engineering, Computer Science and Air-supported Radome Dual Reflector Assembly • Live virtual tours of the radar facility • Majors in Physics, Engineering, Computer Science and Atmospheric Science Air-supported Radome Dual Reflector Assembly REU Students at CSU-CHILL CSU-CHILL Radar Site Educational Field Trips • Tours conducted for small groups of visitors CSU-CHILL Radar Site • Tours conducted for small groups of visitors • Includes introduction to radar, visits to radar hardware and a live demo The Virtual CHILL - VCHILL radar hardware and a live demo Visitors at the Radar Dual-wavelength Feed Assembly 10-cm (S-band) Feed Assembly The Virtual CHILL, or VCHILL system allows remote users to display data Example Measurements with the CSU-CHILL radar both from the CHILL archives as well as from real-time operations. Features Example Measurements with the CSU-CHILL radar Severe thunderstorm observed during the Features • Free download from the CHILL website • Interactive viewing of archived data collected by CSU-CHILL S-band Severe thunderstorm observed during the DC3 project on the evening of June 7, 2012. This storm produced widespread • Interactive viewing of archived data collected by CSU-CHILL • Real-time access to live CSU-CHILL data stream • Cross platform Java-based application 2012. This storm produced widespread damaging hail. Near 0 dB differential reflectivity values were observed in the • Cross platform Java-based application • Incorporates educational bookmarks with featured case studies reflectivity values were observed in the reflectivity core, coincident with observations of large hail shown below. observations of large hail shown below. The hail area also displayed enhanced linear depolarization levels. At a slightly higher elevation angle, a mesocyclone ZDR Zh X-band circulation was present. RHI through the same storm, showing Ψdp and KDP a-scope plots Reflectivity from convective Precipitation on Aug 19, 2011 Hailstones observed from this storm Ψdp and KDP a-scope plots Precipitation on Aug 19, 2011 This facility is sponsored by NSF cooperative agreement no: AGS1138116 Dual-wavelength measurements in snow Hailstones observed from this storm Picture courtesy Mark Lindquist Radial Velocity LDR This facility is sponsored by NSF cooperative agreement no: AGS1138116 Dual-wavelength measurements in snow
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