Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Radar Reflectivity In Wingtip Generated Wake Vortices
Download Radar Reflectivity In Wingtip Generated Wake Vortices full books in PDF, epub, and Kindle. Read online Radar Reflectivity In Wingtip Generated Wake Vortices ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722708429 Total Pages :58 pages Book Rating :4.7/5 (84 download)
Book Synopsis Radar Reflectivity in Wingtip-Generated Wake Vortices by : National Aeronautics and Space Administration (NASA)
Download or read book Radar Reflectivity in Wingtip-Generated Wake Vortices written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents new predictive models of radar reflectivity, with meter-scale resolution, for aircraft wakes in clear air and fog. The models result from a radar design program to locate and quantify wake vortices from commercial aircraft in support of the NASA Aircraft Vortex Spacing System (AVOSS). The radar reflectivity model for clear air assumes: 1) turbulent eddies in the wake produce small discontinuities in radar refractive index; and 2) these turbulent eddies are in the 'inertial subrange' of turbulence. From these assumptions, the maximum radar frequency for detecting a particular aircraft wake, as well as the refractive index structure constant and radar volume reflectivity in the wake can be obtained from the NASA Terminal Area Simulation System (TASS) output. For fog conditions, an empirical relationship is used to calculate radar reflectivity factor from TASS output of bulk liquid water. Currently, two models exist: 1) Atlas-based on observations of liquid water and radar reflectivity factor in clouds; and 2) de Wolf- specifically tailored to a specific measured dataset (1992 Vandenberg Air Force Base). Marshall, Robert E. and Mudukutore, Ashok and Wissel, Vicki Langley Research Center...
Book Synopsis Three-centimeter Doppler Radar Observations of Wingtip-generated Wake Vortices in Clear Air by : Robert E. Marshall
Download or read book Three-centimeter Doppler Radar Observations of Wingtip-generated Wake Vortices in Clear Air written by Robert E. Marshall and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents a high risk, high pay-off experiment with the objective of detecting, for the first time, the presence of aircraft wake vortices in clear air using X-band Doppler radar. Field experiments were conducted in January 1995 at the Wallops Flight Facility (WFF) to demonstrate the capability of the 9.33 GHz (1=3 cm) radar, which was assembled using an existing nine-meter parabolic antenna reflector at WFF and the receiver/transmitter from the NASA Airborne Windshear Radar Program. A C-130 aircraft, equipped with wingtip smoke generators, created visually marked wake vortices, which were recorded by video cameras. A C-band radar also observed the wake vortices during detection attempts with the X-band radar. Rawinsonde data was used to calculate vertical soundings of wake votex decay time, cross aircraft bearing wind speed, and water vapor mixing ratio for aircraft passes over the radar measurement range. This experiment was a pathfinder in predicting, in real time, the location and persistance of C-130 vortices, and in setting the flight path of the aircraft to optimize X-band radar measurement of the wake vortex core in real time. This experiment was conducted in support of the NASA Aircraft Vortex Spacing System (AVOSS).
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722841614 Total Pages :90 pages Book Rating :4.8/5 (416 download)
Book Synopsis Three-Centimeter Doppler Radar Observations of Wingtip-Generated Wake Vortices in Clear Air by : National Aeronautics and Space Administration (NASA)
Download or read book Three-Centimeter Doppler Radar Observations of Wingtip-Generated Wake Vortices in Clear Air written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents a high risk, high pay-off experiment with the objective of detecting, for the first time, the presence of aircraft wake vortices in clear air using X-band Doppler radar. Field experiments were conducted in January 1995 at the Wallops Flight Facility (WFF) to demonstrate the capability of the 9.33 GHz (I=3 cm) radar, which was assembled using an existing nine-meter parabolic antenna reflector at VVTT and the receiver/transmitter from the NASA Airborne Windshear Radar-Program. A C-130-aircraft, equipped with wingtip smoke generators, created visually marked wake vortices, which were recorded by video cameras. A C-band radar also observed the wake vortices during detection attempts with the X-band radar. Rawinsonde data was used to calculate vertical soundings of wake vortex decay time, cross aircraft bearing wind speed, and water vapor mixing ratio for aircraft passes over the radar measurement range. This experiment was a pathfinder in predicting, in real time, the location and persistence of C-130 vortices, and in setting the flight path of the aircraft to optimize X-band radar measurement of the wake vortex core in real time. This experiment was conducted in support of the NASA Aircraft Vortex Spacing System (AVOSS). Marshall, Robert E. and Mudukutore, Ashok and Wissel, Vicki L. H. and Myers, Theodore Langley Research Center...
Book Synopsis Radar Reflectivity in Wingtip-Generated Wake Vortices by : Robert E. Marshall
Download or read book Radar Reflectivity in Wingtip-Generated Wake Vortices written by Robert E. Marshall and published by . This book was released on 1997 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722631635 Total Pages :82 pages Book Rating :4.6/5 (316 download)
Book Synopsis Measured Changes in C-Band Radar Reflectivity of Clear Air Caused by Aircraft Wake Vortices by : National Aeronautics and Space Administration (NASA)
Download or read book Measured Changes in C-Band Radar Reflectivity of Clear Air Caused by Aircraft Wake Vortices written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-08 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wake vortices from a C-130 airplane were observed at the NASA Wallops Flight Facility with a ground-based, monostatic C-band radar and an antenna-mounted boresight video camera. The airplane wake was viewed from a distance of approximately 1 km, and radar scanning was adjusted to cross a pair of marker smoke trails generated by the C-130. For each airplane pass, changes in radar reflectivity were calculated by subtracting the signal magnitudes during an initial clutter scan from the signal magnitudes during vortex-plus-clutter scans. The results showed both increases and decreases in reflectivity on and near the smoke trails in a characteristic sinusoidal pattern of heightened reflectivity in the center and lessened reflectivity at the sides. Reflectivity changes in either direction varied from -131 to -102 dBm(exp -1); the vortex-plus-clutter to noise ratio varied from 20 to 41 dB. The radar recordings lasted 2.5 min each; evidence of wake vortices was found for up to 2 min after the passage of the airplane. Ground and aircraft clutter were eliminated as possible sources of the disturbance by noting the occurrence of vortex signatures at different positions relative to the ground and the airplane. This work supports the feasibility of vortex detection by radar, and it is recommended that future radar vortex detection be done with Doppler systems. Mackenzie, Anne I. Langley Research Center...
Book Synopsis Proceedings of the NASA First Wake Vortex Dynamic Spacing Workshop by : Leonard Credeur
Download or read book Proceedings of the NASA First Wake Vortex Dynamic Spacing Workshop written by Leonard Credeur and published by . This book was released on 1997 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1999 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 37th AIAA Aerospace Sciences Meeting and Exhibit by :
Download or read book 37th AIAA Aerospace Sciences Meeting and Exhibit written by and published by . This book was released on 1999 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aviation System Capacity Program Terminal Area Productivity Project: Ground and Airborne Technologies by : Demo J. Giulianetti
Download or read book Aviation System Capacity Program Terminal Area Productivity Project: Ground and Airborne Technologies written by Demo J. Giulianetti and published by . This book was released on 2001 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preprints - Radar Meteorology Conference by :
Download or read book Preprints - Radar Meteorology Conference written by and published by . This book was released on 1997 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Conference on Radar Meteorology by :
Download or read book International Conference on Radar Meteorology written by and published by . This book was released on 1997 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NASA Langley Scientific and Technical Information Output: 1997 by :
Download or read book NASA Langley Scientific and Technical Information Output: 1997 written by and published by . This book was released on 1998 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exploratory Flight Investigation of Aircraft Response to the Wing Vortex Wake Generated by Jet Transport Aircraft by : William H. Andrews
Download or read book Exploratory Flight Investigation of Aircraft Response to the Wing Vortex Wake Generated by Jet Transport Aircraft written by William H. Andrews and published by . This book was released on 1972 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of intercepting wing tip vortices generated by large jet transports, including jumbo jets, over separation distances from 1 nautical mile to 15 nautical miles is evaluated on the basis of the response of a vortex probe airplane in the roil mode. The vortex probe test aircraft included a representative general aviation airplane, an executive jet, a fighter, and light and medium weight jet transports. The test conditions and airplane configurations were comparable to those normally used during takeoff, landing, or holding pattern operations. For flight safety the tests were performed at altitudes from 9500 feet to 12,500 feet. In addition to an evaluation of the probe airplane response, a flight test technique is suggested for determining minimum separation distance, using as variable the ratio of vortex-induced roll acceleration to maximum lateral control acceleration and the gross weight of the generating aircraft.
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1999-07 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimizing the Radar Detection of Clear Air Turbulence by : David Atlas
Download or read book Optimizing the Radar Detection of Clear Air Turbulence written by David Atlas and published by . This book was released on 1966 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Airborne Windshear Detection and Warning Systems. Fifth and Final Combined Manufacturers' and Technologists' Conference, Part 2 by :
Download or read book Airborne Windshear Detection and Warning Systems. Fifth and Final Combined Manufacturers' and Technologists' Conference, Part 2 written by and published by . This book was released on 1994 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
