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The windvan pulsed co2 doppler lidar wide-area wind sensor
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lawrence, Rhidian |
| Copyright Year | 1990 |
| Description | Wind sensing using a Doppler lidar is achieved by sensing the Doppler content of narrow frequency laser light backscattered by the ambient atmospheric aerosols. The derived radial wind components along several directions are used to generate wind vectors, typically using the Velocity Azimuth Display (VAD) method described below. Range resolved information is obtained by range gating the continuous scattered return. For a CO2 laser (10.6 mu) the Doppler velocity scaling factor is 188 kHz/ms(exp -1). In the VAD scan method the zenith angle of the pointing direction is fixed and its azimuth is continuously varied through 2 pi. A spatially uniform wind field at a particular altitude yields a sinusoidal variation of the radial component vs. azimuth. The amplitude, phase and dc component of this sinusoid yield the horizontal wind speed, direction and vertical component of the wind respectively. In a nonuniform wind field the Fourier components of the variation yields the required information. |
| File Size | 202427 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910002392 |
| Archival Resource Key | ark:/13960/t0xq1ww7k |
| Language | English |
| Publisher Date | 1990-07-01 |
| Access Restriction | Open |
| Subject Keyword | Lasers And Masers Meteorological Radar Laser Outputs Backscattering Scanners Wind Velocity Infrared Radar Sine Waves Frequencies Velocity Distribution Zenith Light Beams Azimuth Wind Measurement Aerosols Doppler Radar Detection Optical Radar Wind Meteorology Carbon Dioxide Lasers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
