Download or read book The Development of a Fixed Base Automated Weather Sensing and Display System written by William R. Tahnk and published by . This book was released on 1978 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Meteorology Division of the Air Force Geophysics Laboratory developed a computer-based observing system called MAWS(Modular Automated Weather System) to demonstrate the feasibility of automated observing and forecasting techniques using low-cost microcomputers. Scott AFB, Illinois, was chosen as the demonstration site, and operation commenced in January 1977. Instrumentation at five observing sites is polled periodically each minute, and then the data are transmitted on command to the central site over voice grade telephone lines using microcomputers that were designed, built, and programmed by the authors. This use of on-site processing eliminated the need for expensive, high speed lines as well as centralized processing. Instead, a microcomputer in the base weather station acts as a supervisor to the four on-site microcomputers, directing the flow of information throughout the network. Parameters observed automatically include wind, temperature, visibility, pressure, and cloud base height. In addition, short range forecasts of visibility and cloud base height are generated. These data are then displayed on alphanumeric display devices located in operations centers around the base. MAWS data are also continually archived and the capability exists for hard copy printout when desired. (Author).
Download or read book The Development of a Fixed Base Automated Weather Sensing and Display System written by William R. Tahnk and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Meteorology Division of the Air Force Geophysics Laboratory developed a computer-based observing system called MAWS(Modular Automated Weather System) to demonstrate the feasibility of automated observing and forecasting techniques using low-cost microcomputers. Scott AFB, Illinois, was chosen as the demonstration site, and operation commenced in January 1977. Instrumentation at five observing sites is polled periodically each minute, and then the data are transmitted on command to the central site over voice grade telephone lines using microcomputers that were designed, built, and programmed by the authors. This use of on-site processing eliminated the need for expensive, high speed lines as well as centralized processing. Instead, a microcomputer in the base weather station acts as a supervisor to the four on-site microcomputers, directing the flow of information throughout the network. Parameters observed automatically include wind, temperature, visibility, pressure, and cloud base height. In addition, short range forecasts of visibility and cloud base height are generated. These data are then displayed on alphanumeric display devices located in operations centers around the base. MAWS data are also continually archived and the capability exists for hard copy printout when desired. (Author)
Download or read book A Demonstration Test of the Modular Automated Weather System MAWS written by Donald A. Chisholm and published by . This book was released on 1980 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Instrumentation Papers written by and published by . This book was released on with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Assessment of an Automated System for Detecting Present Weather written by H. Albert Brown and published by . This book was released on 1979 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The determination of subjective weather observations through the use of an automated array of weather sensors coupled with a decision tree program was examined through analysis of data gathered at the AFGL Weather Test Facility at Otis AFB, Mass. This report describes the instruments used in the array, the response of the instruments to type of weather observed, and the decision tree programs. Preliminary results indicate that a computer-controlled weather sensor array has potential value in determining objectively those types of weather previously relegated to human responsibility.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book The Federal Plan for Meteorological Services and Supporting Research written by and published by . This book was released on 1992 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Automation of Visual Weather Observations written by H. Albert Brown and published by . This book was released on 1980 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was performed to determine the feasibility of objectively and automatically determining two key components of an aviation weather observation: present weather and obstruction to vision. The automated system utilized was an instrumented tower and surface array of sensors located at the AFGL Weather Test Facility (WTF), Otis AFB, Massachusetts. The objective method consisted of a decision-tree program (AUTO) based on several uniquely different responses by these weather sensors to the same weather phenomena and on discrimination techniques using tower and surface instrument comparison. The ability of AUTO to monitor rapidly changing weather events and to discriminate different types of weather is demonstrated through selected hourly periods of observations taken at 1-min intervals. Hourly observations generated over a 14-month period, March 1978 through April 1979, are compared with FAA observations to determine the effectiveness of AUTO. Major areas of agreement were found in the discrimination of fog, haze, snow, rain, and no weather. Final results show that the FAA observations of the existence and non-existence of obstructions to vision and present weather were duplicated in 82 and 86% of the cases. Thus the acquisition of real weather for an aviation weather observation, a duty presently performed by a human observer, is obtainable through an objective decision-tree program using an automated sensor array. (Author).
Download or read book Development and Evaluation of a Tower Slant Visual Range System written by Edward B. Geisler and published by . This book was released on 1979 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meteorological and Geoastrophysical Abstracts written by and published by . This book was released on 1979 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variation in Ground Brightness Over Northeastern United States as Sensed by GOES Satellites written by Thomas J. Keegan and published by . This book was released on 1978 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first step in an investigation of the use of satellite imagery data in automated short-range forecasts of clouds and precipitation is to examine the variation in ground brightness under clear-sky conditions. Bedford, Massachusetts, Albany, New York, Pittsburgh, Pennsylvania, and Dulles International Airport, Virginia, were selected as test sites for the period March to December 1977. Data were corrected for error and noise. Navigation was fine-tuned to an accuracy of 1 to 2 pixels. Average, standard deviation, maximum, minimum and range of brightness were computed over a range of area sizes around each station in order to establish a stable sample size. The statistics stabilized by a 5 x 5 pixel area. Although the number of cases was small, necessitating combining stations, the correlation between brightness and sun angle was high. The slope of the regression curve between these variables was steeper in spring and fall than in summer. Additional data are needed, but it is expected that they will refine rather than revise significantly the present results. (Author).
Download or read book National Airspace System Plan written by United States. Federal Aviation Administration and published by . This book was released on 1984 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tactical Visibility Meter written by Eugene Y. Moroz and published by . This book was released on 1983 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate and timely visibility information is required by the Air Weather Service in support of Air Force tactical bare-base operations. The Air Force Geophysics Laboratory (AGGL) undertook a program to develop a tactical visibility meter (TVM) to satisfy this requirement. A prototype meter was designed and fabricated by Wright & Wright, Inc., Oak Bluffs, Mass. The meter measures the atmospheric scattering coefficient in the forward direction. Visibility is inferred from the measurement. The operation of the prototype meter was successfully demonstrated by AFGL in tests conducted at its Weather Test Facility, Otis AFB, Mass. In the next phase of the development, Wright & Wright, Inc., was tasked to design and fabricate a cost-effective preproduction version of the TVM. This report describes the current development, test, and evaluation of the TVM.
Download or read book Automated Low cost Weather Observation System ALWOS written by and published by . This book was released on 1982 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the primary objectives of this program was to design a developmental model ALWOS for the lowest possible cost. Reliability and maintenance costs over the life of the system were considered in addition to the initial purchase and installation costs. To this end, field proven, off the shelf components were used wherever possible throughout the system. Another primary objective was modularity of design. The hardware and software were constructed to allow flexibility in interfacing a variety of sensors or adding additional sensors to measure new parameters. The ALWOS as configured at Dulles Airport is a low-cost and flexible system which can provide an automatic weather observation from the data acquisition, processing and display point of view, with the potential for good long-term system reliability. After a period of familiarization with the equipment and dealing with an assortment of system and sensor problems, the functioning of the system became relatively trouble-free. Evaluation of the ALWOS supports the generally accepted concept that automated, low-cost weather observation systems can indeed perform such a function given suitable sensing devices. (Author).
Download or read book Report on Research at AFCRL written by Air Force Cambridge Research Laboratories (U.S.) and published by . This book was released on 1976 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Fourth Annual Workshop on Meteorological and Environmental Inputs to Aviation Systems written by and published by . This book was released on 1980 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1978 with total page 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
