Atmospheric wind profiles play an important role to severe weather and boundary layer studies. One technique to capture high temporal wind profiles is the use of radar wind profiles. Radar wind profiles are high frequency phased array radars that operate on the principle of Bragg scattering (small changes in density based on temperature and humidity changes). The radiation emitted is reflected off of these changes in refaction back to the 915. Wind changes can then be detected based on the Doppler shift from wind passing over the instrument.
The wind profiles can then be plotted over time to detect any changes of the wind over time. Examining how these wind profiles change can be critical to analyzing and understanding the severe weather environment or boundary layer characteristics.
SWIRLL currently has two operational 915 MHz wind profilers - one is on MIPS and the other on RaDAPS. Both profilers are the Radiometrics XBS-BL 915 MHz Wind Profiler. Optional clutter panels can be added to the system to reduce ground clutter. The MIPS 915 was upgraded in April of 2019.
- Frequency: 915 MHz
- Beam Numbers: 6
- Antenna Size: 4 m
- Peak Power: 500 W
- Modes: 2 (low mode, high mode)
- Gate Spacing: 21 m in low mode, 71 m in high mode
- First Gate: 126 m
- Range: 5 km
- Temporal Resolution: 5 minutes and 60 minute consensus winds