238000001514 detection method Methods 0.000 title claims description 6.230000002708 enhancing Effects 0.000 title claims description 10.Application granted granted Critical Publication of US4990918A publication Critical patent/US4990918A/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links Assignors: LANZINER, HELMUT H., MICHELSON, DAVID G. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by University of British Columbia filed Critical University of British Columbia Priority to US07/455,701 priority Critical patent/US4990918A/en Assigned to UNIVERSITY OF BRITISH COLUMBIA reassignment UNIVERSITY OF BRITISH COLUMBIA ASSIGNMENT OF ASSIGNORS INTEREST. Original Assignee University of British Columbia Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Lanziner Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US07/455,701 Inventor David G. Google Patents Radar reflector to enhance radar detectionÄownload PDF Info Publication number US4990918A US4990918A US07/455,701 US45570189A US4990918A US 4990918 A US4990918 A US 4990918A US 45570189 A US45570189 A US 45570189A US 4990918 A US4990918 A US 4990918A Authority US United States Prior art keywords radar reflector center line planar faces plane Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4990918A - Radar reflector to enhance radar detection Attenuation is removed with the aid of radiosonde data, and the difference in the calibration between the UMass and Penn State radars is determined by comparing the ratio of 94-GHz and 95-GHz reflectivity values to a model that accounts for parallax effects of the two antennas used in the Penn State system.US4990918A - Radar reflector to enhance radar detection A relative calibration of between the Penn State and UMass radars is made from the statistical comparison of zenith pointing measurements of low altitude liquid clouds. An absolute calibration of the UMass radar was made from radar measurements of a trihedral corner reflector, which has a known radar cross-section. This abstract presents some initial results from more » our calibration efforts. ![]() The two systems were separated by approximately 75 meters and simultaneously observed a variety of cloud types at verticle incidence over the course of the experiment. The Penn State radar operates at 93.95 GHz and has separate transmitting and receiving antennas. The UMass Cloud Profiling Radar System (CPRS) operates simultaneously at 33.12 GHz and 94.92 GHz through a single antenna. During April 1994, the University of Massachusetts (UMass) and the Pennsylvania State University (Penn State) fielded two millimeter-wave atmospheric radars in the Atmospheric Radiation Measurement Remote Cloud Sensing Intensive Operation Period (RCS-IOP) experiment.
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