Forward Scatter Meter Measurements Of Slant Visual Range
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Forward Scatter Meter Measurements Of Slant Visual Range
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Author : Wayne S. Hering
language : en
Publisher:
Release Date : 1978
Forward Scatter Meter Measurements Of Slant Visual Range written by Wayne S. Hering and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Airports categories.
The potential for remote tower measurements of point visibility in the determination of slant range visibility for aircraft landing operations was explored through analysis of data collected at the Air Force Geophysics Laboratory Weather Test Facility at Otis AFB, Massachusetts. This report described initial experiments that deal with an analysis of the small scale variability of extinction coefficient in time and space. Data from two instrumented towers spaced 1500 ft apart were classified for investigation of the horizontal variability of visibility at elevations up to 100 ft and space-time variability for lag periods from 0 to 10 minutes. The preliminary tests give additional evidence that the runway visual range (RVR) measurements alone often are not representative of pilot visibility during approach and touchdown. Remote measurements of visibility using either a 50-ft or 100-ft instrumented tower would add significantly to the real safety of 'see-to-land' operations under conditions of Categories I, II, and IIIa through an improved description of conditions related to airfield visibility. (Author).
Forward Scatter Meter Measurements Of Slant Visual Range
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Author : Wayne S. Hering
language : en
Publisher:
Release Date : 1978
Forward Scatter Meter Measurements Of Slant Visual Range written by Wayne S. Hering and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Airports categories.
The potential for remote tower measurements of point visibility in the determination of slant range visibility for aircraft landing operations was explored through analysis of data collected at the Air Force Geophysics Laboratory Weather Test Facility at Otis AFB, Massachusetts. This report described initial experiments that deal with an analysis of the small scale variability of extinction coefficient in time and space. Data from two instrumented towers spaced 1500 ft apart were classified for investigation of the horizontal variability of visibility at elevations up to 100 ft and space-time variability for lag periods from 0 to 10 minutes. The preliminary tests give additional evidence that the runway visual range (RVR) measurements alone often are not representative of pilot visibility during approach and touchdown. Remote measurements of visibility using either a 50-ft or 100-ft instrumented tower would add significantly to the real safety of 'see-to-land' operations under conditions of Categories I, II, and IIIa through an improved description of conditions related to airfield visibility. (Author)
Development And Evaluation Of A Tower Slant Visual Range System
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Author : Edward B. Geisler
language : en
Publisher:
Release Date : 1979
Development And Evaluation Of A Tower Slant Visual Range System written by Edward B. Geisler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with categories.
Analysis of remote tower forward scatter meter measurements of extinction coefficient collected at the Air Force Geophysics Laboratory Weather Test Facility at Otis AFB, Massachusetts demonstrated the accuracy of a remote tower slant visual range (SVR) system. This report describes the final phase of the development and evaluation of a tower SVR system in which the remote tower approach has been extended to include Category I operations. Tests give additional evidence that the runway visual range (RVR) measurements are often not representative of pilot visibility during approach and touchdown. An examination of three short range prediction techniques for forecast times of 2, 5, 10, 30 and 60 minutes revealed that the Equivalent Markov technique provides accurate and reliable forecasts of below-limit SVR conditions and yields slightly better results than the Markov and REEP techniques. (Author).
Development And Evaluation Of A Tower Slant Visual Range System
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Author : Edward B. Geisler
language : en
Publisher:
Release Date : 1979
Development And Evaluation Of A Tower Slant Visual Range System written by Edward B. Geisler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Markov processes categories.
Analysis of remote tower forward scatter meter measurements of extinction coefficient collected at the Air Force Geophysics Laboratory Weather Test Facility at Otis AFB, Massachusetts demonstrated the accuracy of a remote tower slant visual range (SVR) system. This report describes the final phase of the development and evaluation of a tower SVR system in which the remote tower approach has been extended to include Category I operations. Tests give additional evidence that the runway visual range (RVR) measurements are often not representative of pilot visibility during approach and touchdown. An examination of three short range prediction techniques for forecast times of 2, 5, 10, 30 and 60 minutes revealed that the Equivalent Markov technique provides accurate and reliable forecasts of below-limit SVR conditions and yields slightly better results than the Markov and REEP techniques. (Author).
Objective Prediction Of Slant Visual Range During Advective Fog Situations
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Author : Edward B. Geisler
language : en
Publisher:
Release Date : 1980
Objective Prediction Of Slant Visual Range During Advective Fog Situations written by Edward B. Geisler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.
The final phase of the Air Force Geophysics Laboratory development and evaluation of a remote tower slant visual range (SVR) system is described. Remote tower forward scatter meter measurements of atmospheric extinction coefficient are used to estimate the SVR in the simulated approach zone. Three prediction techniques, Markov, Regression Estimate of Event Probabilities (REEP), and Equivalent Markov, are evaluated and yield probability estimates of below-limit SVR conditions for forecast times to 1 h. For Categories I and II conditions, such a system would have a probability of detection of below-limit SVR conditions of 91%. The Equivalent Markov technique is shown to provide accurate and reliable forecasts and yield slightly better results than Markov and REEP. (Author).
Flight Test Evaluation Of Slant Visual Range Approach Light Contact Height Svr Alch Measurement System
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Author : Gerald S. Bradley
language : en
Publisher:
Release Date : 1976
Flight Test Evaluation Of Slant Visual Range Approach Light Contact Height Svr Alch Measurement System written by Gerald S. Bradley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Airports categories.
The Slant Visual Range/Approach Light Contact Height (SVR/ALCH) System reports the slant visual range that can be seen when the pilot is at 100 feet above ground level and the approach light contact height, which is the altitude at which a pilot will see five light bars, as a landing is conducted under Category II conditions. To provide SVR/ALCH information, the system utilizes a 100-foot tower equipped with forward scatter and luminance meters, an illuminance meter, a touchdown transmissometer, and a minicomputer to process the data. The system was installed at the National Aviation Facilities Experimental Center (NAFEC) and data collected during the period from the fall of 1974 through January 1976. The main objective of this program phase (Phase III) was to evaluate the SVR/ALCH system in terms of accuracy of the SVR and ALCH algorithms compared to what a pilot actually sees during an approach. From the limited data obtained to date, there is evidence that the algorithms predict SVR and ALCH values which agree reasonably well with what the pilot sees. (Author).
Development And Evaluation Of A Tower Slant Visual Range System
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Author : Edward B. Geisler
language : en
Publisher:
Release Date : 1979
Development And Evaluation Of A Tower Slant Visual Range System written by Edward B. Geisler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Visibility categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Air Force Surveys In Geophysics
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Author :
language : en
Publisher:
Release Date : 1978
Air Force Surveys In Geophysics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Geophysics categories.
Report On Research At Afcrl
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Author : Air Force Cambridge Research Laboratories (U.S.)
language : en
Publisher:
Release Date : 1976
Report On Research At Afcrl written by Air Force Cambridge Research Laboratories (U.S.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Geophysics categories.