Use of Doppler Sodar in atmospheric measurements
نویسندگان
چکیده
منابع مشابه
Quantifying error of lidar and sodar Doppler beam swinging measurements of wind turbine wakes using computational fluid dynamics
Wind-profiling lidars are now regularly used in boundary-layer meteorology and in applications such as wind energy and air quality. Lidar wind profilers exploit the Doppler shift of laser light backscattered from particulates carried by the wind to measure a line-of-sight (LOS) velocity. The Doppler beam swinging (DBS) technique, used by many commercial systems, considers measurements of this L...
متن کاملEvaluation of Geometric and Atmospheric Doppler for GNSS-RO Payloads
To reduce the sampling rate in global navigation satellite system (GNSS)-radio occultation receivers, it is essential to establish a suitable estimation of Doppler frequency from the received signal in the satellite onboard receiver. This receiver is usually located on low earth orbit satellite and receives GNSS satellites signal in the occultation situation. The occurred Doppler on the signal ...
متن کاملThe SODAR
SODAR stands for SOund Detection And Ranging. A SODAR uses sound pulses at a frequency of about 2kHz to detect turbulence and measure wind speeds. Turbulence in the atmosphere reflects a portion of the acoustic energy back towards the ground. The SODAR measures the strength, time delay and doppler shift of these echoes. The time delay of the echo determines the height from which the echo return...
متن کاملMeasurements of Atmospheric Antiprotons
We measured atmospheric antiproton spectra in the energy range 0.2 to 3.4 GeV, at sea level and at balloon altitude in the atmospheric depth range 4.5 to 26 g/cm. The observed energy spectra, including our previous measurements at mountain altitude, were compared with estimated spectra calculated on various assumptions regarding the energy distribution of antiprotons that interacted with air nu...
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ژورنال
عنوان ژورنال: Ciência e Natura
سال: 2000
ISSN: 2179-460X,0100-8307
DOI: 10.5902/2179460x36911