Temperature Accurate in All Weather
Spacing Matches Radar Winds
Lifetime Calibration-Free
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RASS for Radar Wind Profilers

A RASS Extension for LAP® Series makes a Scintec LAP® Series Radar a high-performance temperature profiler also. The RASS Extension for LAP® Series consists of four acoustic sources which are placed around the antenna of the radar wind profiler. The acoustic sources emit sound waves into the vertical direction. The sound waves act as reflectors for the radio waves emitted from the radar wind profiler. The Doppler shift of the reflected radio waves depends on the travel speed of the sound waves and hence on the temperature within the volume comprising the propagating radar pulses. The operation software inverts the relationship and calculates the temperature versus height.

The RASS Extension for LAP® Series is easily integrated into an existing LAP® Series Radar Wind Profiler system. The vertical spacing of the temperature measurements corresponds to the spacing of the vertical wind measurements.

The RASS technology is unmatched when it comes to accuracy and reliability of temperature measurements and superior to passive radiometer sensors. Unlike radiometers, the RASS can resolve even complex temperature structures and does not require any regular calibration. This makes the RASS not only the most accurate and reliable but also the most cost-effective remote temperature measurement solution.

Applications
Air Quality
Aviation
Climate Research
Emergency Response
Meteorological Research
Severe Weather
Spaceports
Weather Forecasting
Models
RASS Extension for LAP®3000

This RASS Extension adds the capability for measuring temperature profiles to a LAP®3000 Radar Wind Profiler.

vertical temperature profiles with high spatial resolution
maximum height 1.5 km above the ground
4 acoustic sources with 1.2 m diameter each
unmatched accuracy
RASS Extension for LAP®8000

This RASS Extension adds the capability for measuring temperature profiles to a LAP®8000 Radar Wind Profiler.

vertical temperature profiles with high spatial resolution
maximum height 2.5 km above the ground
4 acoustic sources with 1.5 m diameter each
unmatched accuracy
Competitive Advantages
Suitable for Unusual Temperature Profiles
When it comes to safety in aviation or air quality emergency response, it is important that a remote temperature sensor can reliably measure even in unusual meteorological conditions. As an active system, RASS can reliably measure temperature profiles even in cases of extraordinary vertical temperature distributions, such as strong inversions. This differs from a radiometer which, as a passive system, only receives natural thermal radiation and must derive temperature profiles using statistical methods. While a radiometer can produce good average RMS differences (if calibrated and trained properly), unlike RASS it often fails in individual situations.
Reliable Operation With Precipitation
RASS operates with wavelengths which are much longer than the size of precipitation particles. Also, RASS does not involve radiometry which is affected by water-related absorption. Both characteristics allow RASS to measure in precipitation without performance degradation.
Lifetime Calibration-Free
RASS systems are lifetime calibration-free. RASS derives temperature from relative changes in Doppler frequency which are determined using digital technology. Hence a RASS Extension for LAP® Series is long term stable and there is no calibration drift over weeks, months or years.