![]() ![]() In this work, an FPGA based L- band Pulse Doppler radar prototype, which is used for target detection, localization and velocity calculation has been built and a general-purpose Pulse Doppler radar processor has been developed. Radar systems are widely used for surveillance, air security, navigation, weather hazard detection, as well as remote sensing applications. The received signal is then processed for information extraction. Objects reradiate a portion of energy which is captured by the radar receiver. ![]() Radar systems propagate electromagnetic energy, from the antenna which is in part intercepted by an object. Error correction techniques were developed and are described including implementation details.įpga based L- band pulse doppler radar design and implementationĪs its name implies RADAR (Radio Detection and Ranging) is an electromagnetic sensor used for detection and locating targets from their return signals. An analysis of the pulse Doppler tracking loop is presented and a mathematical model for the error was developed. ![]() The discovery of a C Band radar pulse Doppler error is discussed and use of the GEOS 3 satellite's coherent transponder to isolate the error source is described. Below 2 km altitude, measurements of dual wavelength ratio (DWR) based on Ka and S-band reflectivities from the KASPR and NEXRADĬ- band radar pulse Doppler error: Its discovery, modeling, and elimination The weakly increased ZDR could be produced by large, faster falling particles such as quasi-spherical aggregates, while the enhanced KDP could be produced by highly-oriented oblate, slowly-falling particles. The Doppler spectra showed that slower-falling particles ( 1 m s-1). During the snowstorm events the radar observed relatively larger ZDR (1-1.5 dB) and enhanced KDP (1-2 ° km-1) at heights corresponding to a plate/dendrite crystal growth regime. The radar scan strategy was a combination of PPI scans at 4 elevation angles (10, 20, 45, and 60°) and RHI scans in polarimetry mode, and zenith pointing with Doppler spectra collection. The instruments collected initial datasets during two snowstorm events and two snow shower events in March 2017. The facility also includes a micro-rain radar and a microwave radiometer capable of measuring reflectivity profiles and integrated liquid water path, respectively. The KASPR can measure Doppler spectra and full polarimetric variables, including radar reflectivity, differential reflectivity (ZDR), differential phase (φDP), specific differential phase (KDP), correlation coefficient (Ïhv), and linear depolarization ratio (LDR). A Ka- band scanning polarimetric radar, named KASPR, was installed in an observation facility at Stony Brook University, located 22 km west of the KOKX NEXRAD radar at Upton, NY. In particular, millimeter-wavelength radar Doppler spectra can reveal supercooled liquid cloud droplets embedded in ice precipitation clouds. In addition to polarimetric parameter observations, Doppler spectra measurements offer unique insights into ice particle properties according to particle fall velocities. Polarimetric radar analyses offer the capability of identification of ice hydrometeor species as well as their spatial distributions. Using Macromedia Dreamweaver and PHP, developed the integrated monitoring platform for the doppler weather SA- band radar which could monitor the real-time radar system running status and important performance indicators such as radar power,status parameters and others on Web page,and when the status is abnormal it will trigger the audio alarm.Ī New Ka- Band Scanning Radar Facility: Polarimetric and Doppler Spectra Measurements of Snow Events The doppler weather SA- band radar is an important part of modern meteorological observation methods, monitoring the running status of radar and the data transmission is important.This paper introduced the composition of radar system and classification of radar data,analysed the characteristics and laws of the radar when is normal or abnormal. Development and Application of integrated monitoring platform for the Doppler Weather SA- BAND Radar ![]()
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