The Scintec windRASS™ upgrades the sodar models SFAS or MFAS to work in radio-acoustic mode for precise measurements of both wind and temperature. This differs from conventional RASS where radio-acoustic sounding is used for temperature measurements only.
With windRASS™, acoustic and electro-magnetic beams are emitted in vertical and tilted directions. The electromagnetic waves are backscattered at the acoustic waves and a Doppler analysis is performed. Wind and temperature are derived via their influence on the speed of sound. windRASS™ is the first wind and temperature profiler that works anywhere, anytime. It is immune to ground clutter and ambient noise, making it a perfect solution for urban or industrial environments. Since windRASS™ does not depend on the existence of atmospheric turbulence, it operates at full performance in the marine boundary layer (coastal sites), foggy conditions or calm nights, each characterized by low turbulence levels. In addition, windRASS™ is not compromised by precipitation.
The Extended-Sweep Inversion technique (ESI) significantly increases the signal-to-noise ratio and allows for measurement ranges far wider than those of traditional RASS systems.
windRASS™ is operated using APRun with extensive graphical display options and remote access support.
Immune to Ground Clutter and Noise
ESI Technology for Maximum Data Availability
immune to ground clutter and noise
tolerates turbulence-free atmospheres
Extended-Sweep Inversion technology for maximum data availability
maximum range up to 600 / 800 m with Sodar SFAS / MFAS
vertical resolution down to 5 / 10 m precision with Sodar SFAS / MFAS
various remote access options
(No.) # (Description)
1. # wind speed and direction (RASS mode)
2. # standard deviations of wind components (RASS mode)
3. # standard deviation of wind directions (sigma phi, sigma theta) and stability class for air quality applications (RASS mode)
4. # wind shear for airport applications (RASS mode)
5. # temperature and virtual temperature
6. # inversion identifier
7. # data quality (RASS mode)
(Description) # (Specification) # (Remarks)
Radio antenna # dual-bar slot antenna # easy disassembly for transport
Radio frequency # 1290 MHz, 915 MHz # other frequencies on request
Vertical resolution # 5 / 10 with SFAS / MFAS # depending on Sodar model
Minimum range # 40 m # depending on settings, environment and atmosphere
Maximum range # 600 / 800 with SFAS / MFAS # depending on settings, environment and atmosphere
Averaging time # 1 – 60 min # user-defined
Accuracy of horizontal wind speed # 0.3 to 0.5 m/s # depending on mode, average over varying conditions
Accuracy # 0.2 °C # virtual temperature
Measurement range # -50 °C to +60 °C
Operating temperature -35 to +50 °C (-30 to +120 °F)
Power requirement DC operation # +14 VDC, 7A # depending on mode
Power requirement AC line operation # 104 to 132 VAC, 160 W or 207 to 264 VAC, 160 W # 120V model or 230V model