The observational error of AMDAR is influenced by aircraft flight altitude and atmospheric condition. In this study, the wind speed and altitude dependent observational error of AMDAR is estimated. The statistical results show that the temperature and the observational error in wind speeds slightly ...
The invention relates to a wind-speed measurement apparatus using the Doppler effect in the light-frequency region. It comprises a laser (1) which emits pulses, a telescope (4) which receives the scattered light and an interferometer (10) used for measuring the spectral displacement of the ...
Wind speed estimation for low-altitude windshear based on Space-Time APES When detecting low-altitude windshear with airborne weather radar, the real signals are usually covered with strong clutter. In this paper, according to th... H Li,B Zhang,R Wu,... - Radar Conference 被引量: 5发表...
All that energy can contribute to wind speed, but the wind speed doesn’t get that high at lower altitudes and lower and higher latitudes. Differentiating these speeds was one of the unique parts of this study. To do so, the researchers utilized data collected by two different instruments –...
vary with altitude relative toz = 10 m. Moreover, we do not address the specific operational need to predict the local (point) maximum wind speed, which must account for, e.g., the effects of azimuthal asymmetries in the wind field that can modulate peak local wind speed with ...
Meteorological profiles as measured by radiosonde ascent at Keflavík International Airport. Profiles of a, d wind speed, b, e temperature and c, f relative humidity as a function of altitude are shown. The data in a–c are used to describe the atmospheric conditions at Eyjafjallajökull on...
Hurricane Imaging Radiometer (HIRAD) Wind Speed Retrievals and Assessment Using Dropsondes Dropsondes from the High Definition Sounding System (HDSS) that was flown with HIRAD on a WB-57 high altitude aircraft in TCI were used to assess the quality of the HIRAD wind speed retrievals. The root ...
It analyzes the effects of different wind speed on the result of 100m sprint and the cause of difference between the application of different models. It tries to provide reference for the establishment of sprint mathematical model and the standardization of sprint performance.supports all the CNKI ...
Intercomparison experiments of the lidar wind profile measurements were performed with pilot balloons. Results showed that the standard deviation of wind speed and wind direction, for the 2-4 km altitude range, were 0.985 m/s and 17.9 degrees, respectively. 展开 ...
the wind speed and the reflection signal phase RMS relation,qualitative analysis of the influence of surface roughness on the accuracy of the height altimetry was performed.We find that the error of the sea surface altimetry RMS is nearly doubled when the skewing RMS is increased by 0.005 rad....