Download or read book Radar Detection of Thunderstorm Hazards for Air Traffic Control Volume I Storm Cell Detection written by Robert K. Crane and published by . This book was released on 1976 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A procedure was developed to detect hazardous regions within thunderstorms using weather radar data. The procedure is based upon the hypothesis that convective turbulence occurs within 2-3 km of relative radar reflectivity maxima (cells). The hypothesis was tested using a limited set of simultaneous aircraft radar data. Good agreement was found between the observed regions of convective turbulence and the cell locations determined by radar. The viability of the hazard detection hypothesis as a basis for automatic warning and forecast depends upon the reliability of the cell detection and tracking algorithms. Analysis of precision radar data revealed that the cells are small in area extent, have a detection probability in excess of 0.9 using multiple radar scans, and are readily tracked for periods between 10 and 20 minutes. The characteristics of radar systems for acquiring data to support cell detection, are discussed. The role of Doppler spectral data is explored, and it is found that practical limitations on radar beamwidth hamper direct observation of turbulence on the scale size hazardous to aircraft. (Author).
Download or read book Radar Detection of Thunderstorm Hazards for Air Traffic Control written by Lincoln Laboratory and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radar Detection of Thunderstorm Hazards for Air Traffic Control Volume II Radar Systems written by S. M. Sussman and published by . This book was released on 1976 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radar systems are investigated for the acquisition of weather data to support detection and forecasting of hazardous turbulence assoicated with individual storm cells. Utilization of the FAA Airport Surveillance Radar (ASR) is explored. The issues of antenna polarization and Sensitivity Time Control (STC) that impact on shared operation for aircraft and weather detection are addressed. Candidate system configurations employing a common RF channel and dual orthogonal polarization channels are discussed. Ground clutter discrimination by coherent Doppler and noncoherent (Doppler spread) processing methods is described. An interim procedure is suggested for obtaining fixed reflectivity contour data from a Moving Target Detector for use in the all-digital ARTS. A preliminary design is presented for a new joint-use, long-range weather radar to support enroute air traffic controllers and to meet the data requirements of the National Weather Service and the Air Weather Service. (Author).
Download or read book RADAR DETECTION OF THUNDERSTORM HAZARDS FOR AIR TRAFFIC CONTROL VOL 1 STORM CELL DETECTION written by R. K. Crane and published by . This book was released on 1976 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aviation Weather Surveillance Systems written by Pravas Mahapatra and published by IET. This book was released on 1999 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on radar-based surveillance, this book has been written to provide a comprehensive introduction to the science, sensors and systems that form modern aviation weather surveillance systems.
Download or read book Thunderstorm Turbulence Hazard Detection written by R. K. Crane and published by . This book was released on 1980 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the development and testing of a viable aircraft hazard detection scheme which operates as well employing conventional radar data as it does employing Doppler radar data. The detection scheme was evaluated using aircraft penetrations into the most turbulent regions of hail storms. These regions are of interest when verifying that turbulence can be detected but are not optimum for evaluating the detection technique under realistic operating conditions. If, in the latter case, higher false alarm rates can be expected, more development will be necessary to utilize more effectively the available information before the hazard detection procedure can be incorporated into an air traffic control environment. The recommended program to develop the automatic hazard detection system include: refine the cell and cluster detection algorithms to reduce the effect of the statistical uncertainties in the estimation of velocity perturbations; refine the cell significance algorithms using cell age location in the development pattern, apparent vertical transport of horizontal momentum and similar parameters to provide and indication of the intensity of the turbulence; and develop a graphical display of the cell, cluster and contour data that can be provided both to meteorologists for the development of short range forecasts.
Download or read book To Improve the Detection of Hazardous Aviation Weather written by United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Aviation and published by . This book was released on 1986 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radar Detection of Turbulence in Thunderstorms written by Alan R. Bohne and published by . This book was released on 1981 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretical investigations are undertaken to relate intensity of turbulent air motion to Doppler radar spectrum mean and variance in precipitation environments. Examples of theoretical radar derived turbulence power density spectra and total precipitation motion variance show that effects due to imperfect particle response are significant for turbulence scale lengths less than 250 m. Doppler spectrum variance and estimated eddy dissipation rate (epsilon) are found strongly dependent upon precipitation environment for ranges less than about 20 km, and for cases where the turbulence outer scale length (lambda) is less than 0.5 km. They are also found to be essentially independent of lambda when the maximum pulse volume dimension is less than 1/2 lambda, and independent of range but strongly dependent on lambda at ranges where the maximum pulse volume dimension is greater than lambda. Estimation of epsilon by radar is shown to be unreliable until a method of remotely determining lambda is found. Nevertheless, classification of turbulence severity (index = cube root of epsilon is possible with only a reasonable guess of lambda. Analyses of aircraft/gust velocity data indicate that thunderstorm turbulence is localized into discrete patches, and that such localization must be accounted for when aircraft gust velocity data undergo power spectrum analysis.
Download or read book Aviation Safety written by United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Aviation and published by . This book was released on 1986 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federal Plan on Supporting Research in Surface based Weather Radars written by United States. Office of Federal Coordinator for Meteorological Services and Supporting Research and published by . This book was released on 1968 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison of Wind Velocity in Thunderstorms Determined from Measurements by a Ground based Doppler Radar and an F 106B Airplane written by J. W. Usry and published by . This book was released on 1985 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Federal Plan for Meteorological Services and Supporting Research written by and published by . This book was released on with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1990 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book H R 13715 National Weather Service Act of 1978 successor to H R 8763 written by United States. Congress. House. Committee on Science and Technology. Subcommittee on Transportation, Aviation, and Weather and published by . This book was released on 1978 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Detection and Presentation of Severe Thunderstorms by Airborne and Ground based Radars written by Kenneth Earl Wilk and published by . This book was released on 1969 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations of severe thunderstorms by a WSR-57 radar are compared with PP! displays obtained simultaneously with Collins X- and C-band, and Bendix Ka-band airborne radars, and with the ARSR-1D air traffic control radar used by the FAA. Reflectivity estimates based on the S-band WSR-57 radar are used to evaluate the effects on core measurements by intervening precipitation.
Download or read book Severe Storms Detection and Circumnavigation written by United States. Weather Bureau and published by . This book was released on 1963 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
