Development And Calibration Of The Forward Scatter Visibility Meter
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Development And Calibration Of The Forward Scatter Visibility Meter
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Author : H. Stuart Muench
language : en
Publisher:
Release Date : 1974
Development And Calibration Of The Forward Scatter Visibility Meter written by H. Stuart Muench and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Calibration categories.
A new visibility instrument, the forward scatter visibility meter, has been developed. This report describes the development of the instrument, including the various field tests. Some thirty instruments have been operationally deployed in a network of automatic weather stations near L.G. Hanscom Field in Bedford, Mass. Comparisons between field instruments and transmissometers yield differences of about plus or minus 19 percent. Comparisons with visual observations show differences of plus or minus 34 percent and greater. Analyses of individual cases uncovered difficulties with the response time of observers and with ability to diagnose spatially varying visibility. The accuracy of visibility measurements is assessed and the report concludes by looking at the future of visibility instruments. (Author).
Development And Calibration Of The Forward Scatter Visibility Meter
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Author : H. Stuart Muench
language : en
Publisher:
Release Date : 1974
Development And Calibration Of The Forward Scatter Visibility Meter written by H. Stuart Muench and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.
A new visibility instrument, the forward scatter visibility meter, has been developed. This report describes the development of the instrument, including the various field tests. Some thirty instruments have been operationally deployed in a network of automatic weather stations near L.G. Hanscom Field in Bedford, Mass. Comparisons between field instruments and transmissometers yield differences of about plus or minus 19 percent. Comparisons with visual observations show differences of plus or minus 34 percent and greater. Analyses of individual cases uncovered difficulties with the response time of observers and with ability to diagnose spatially varying visibility. The accuracy of visibility measurements is assessed and the report concludes by looking at the future of visibility instruments. (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).
Instrumentation Papers
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Author :
language : en
Publisher:
Release Date :
Instrumentation Papers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Aeronautical instruments categories.
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.
The Variability Of Airfield Visibility
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Author : Donald A. Chisholm
language : en
Publisher:
Release Date : 1974
The Variability Of Airfield Visibility written by Donald A. Chisholm and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Airports categories.
In this paper some results are presented concerning temporal and spatial variability of automated visibility measurements along a runway in conjunction with tower measurements. Comparisons are also made with variability statistics drawn from multi-transmissometer systems evaluated for the FAA.
A Climatological Study Of The Afgl Mesonetwork
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Author : H. Albert Brown
language : en
Publisher:
Release Date : 1982
A Climatological Study Of The Afgl Mesonetwork written by H. Albert Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Automatic meteorological stations categories.
A Demonstration Test Of The Modular Automated Weather System Maws
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Author : Donald A. Chisholm
language : en
Publisher:
Release Date : 1980
A Demonstration Test Of The Modular Automated Weather System Maws written by Donald A. Chisholm and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Automatic meteorological stations categories.
A microprocessor-based automated airfield weather observing and forecasting system called MAWS (Modular Automated Weather System) was developed to demonstrate the feasibility of modernizing many of the observing and forecasting functions performed in operational base weather stations. Scott Air Force Base, Illinois, was chosen as the demonstration site and operations were conducted from January 1977 through January 1979. Weather sensors at five observation sites around the airfields were polled several times each minute, the data transmitted over commercial, voice-grade telephone lines to a central supervisory microprocessor where the data were suitably collated, averaged and formatted for display on alpha-numeric display devices at key locations and for magnetic tape archiving for post analysis. The demonstration confirmed that modernized weather support can be largely achieved with state-of-the-art, commercially available hardware/software. Such a system would be compatible with other automation efforts in civilian weather services and other C-cubed efforts in the DOD. The advantage of spatially and temporally detailed weather information in marginal and adverse situations was documented. Sensor siting considerations were addressed in relation to specific weather elements and observational requirements. The contributions of automated met watch procedures and short-range guidance forecasts of RVR landing minima were demonstrated. Feedback on system performance and acceptability was obtained from cognizant AWS offices.
Air Force Surveys In Geophysics
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Author :
language : en
Publisher:
Release Date : 1975
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 1975 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 : 1972
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 1972 with Geophysics categories.