sodar การใช้

• RASS can be added to a radar wind profiler or to a sodar system.
• Since the wind data are obtained by the sodar, the radar only needs to sample along the vertical axis.
• Compact-beam sodars are more accurate in complex terrain where the wind vector can change across the measurement area of the sodar.
• SODAR and Doppler LIDAR have been used in numerous studies to identify, quantify and relate the jets to atmospheric transport of hazardous materials.
• The Reese Center is also home to several radar systems including a SODAR, Low Level Profiler, and the SMART-R Mobile Radar.
• Sodar systems are used to measure wind speed at various heights above the ground, and the thermodynamic structure of the lower layer of the atmosphere.
• When RASS is added to a sodar, the necessary radar subsystems are added to transmit and receive the radar signals and to process the radar reflectivity information.
• The sodar transducers are used to transmit the acoustic signals that produce the Bragg scattering of the radar signals, which allows the speed of sound to be measured by the radar.
• Sodars designed for the wind energy industry also differ in important aspects such as the traceability of data as a number of manufacturers do not return full signal and noise spectrum data from the sodar unit, but rather, only return processed wind speed data.
• Existing hardware for these measurements includes Light Detection and Ranging ( LIDAR ), Sonic Detection and Ranging ( SODAR ), radar, autonomous underwater vehicles ( AUV ), and remote satellite sensing, although these technologies should be assessed and refined, according to a report from a coalition of researchers from universities, industry, and government, supported by the Atkinson Center for a Sustainable Future.
• Active collection, on the other hand, emits energy in order to scan objects and areas whereupon a sensor then detects and measures the radiation that is reflected or backscattered from the target . radar, lidar, and SODAR are examples of active remote sensing techniques used in atmospheric physics where the time delay between emission and return is measured, establishing the location, height, speed and direction of an object.