Download or read book Relationship of Automated Weather Observations to Subjective Elements written by JT. Bradley and published by . This book was released on 1978 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditionally, surface weather observations have been made by human observers. It has been their difficult task to estimate subjective elements such as sky cover (in tenths) and the heights of clouds (often to the nearest 100 ft). Automation has moved slowly to replace subjective methods in the field and, even then, usually only in special areas such as runway visual range (RVR) and runway visibility (RVV). Recent work has demonstrated that automated observations of other subjective elements are feasible and are already operational at two points in the United States.
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 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 Air Quality Meteorology and Atmospheric Ozone written by A. L. Morris and published by ASTM International. This book was released on 1978 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Very Short Range Statistical Forecasting of Automated Weather Observations written by Robert G. Miller and published by . This book was released on 1988 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Automated Surface Observing System written by and published by . This book was released on 1998 with total page 108 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 0 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 Proceedings of the Symposium on Wildland Fire 2000 written by and published by . This book was released on 1987 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States of America AIP Aeronautical Information Publication written by and published by . This book was released on 1997 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Review of General Aviation written by United States. Congress. House. Committee on Ways and Means. Subcommittee on Oversight and published by . This book was released on 1978 with total page 528 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 1988 with total page 712 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 Monthly Weather Review written by and published by . This book was released on 1976 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Tropical Meteorology written by Rattan K. Datta and published by Concept Publishing Company. This book was released on 1996 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a well known fact that with the existing level of available technology, India can easily double its agricultural production and productivity. However, what is preventing us from achieving the above production level is the lack of an efficient administrative organisation which can take the benefits of technological advances to the door steps of farmers. It is clear that the most important issue to be tackled with regard to agricultural development in India in the coming years is not the fabrication of new technologies but development of efficient organisations which will transfer the available technologies into production accomplishments. Thus there is a need for scientific study of organisations dealing with agricultural development. There are very few investigations on functioning of agricultural administration .The present study has been undertaken to analyse the structure, processes and functioning of agricultural administration of agriculturally developed and less developed states. Does the agricultural administration of developed state significantly differ from that of less developed state significantly differ from that of less developed state? If yes, in what dimensions? The present study provides answer to this question. The book, divided into eleven chapters, gives a comparative account of different organisational aspects of department of agriculture in a developed and a less developed states. The items discussed include organisational context, structure, processes, personnel policies, and effectiveness.
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 A Comparison of Lightning Network Data with Surface Weather Observations written by H. Albert Brown and published by . This book was released on 1989 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to demonstrate the effectiveness of a lightning detection network in providing a real-time data base from which automated observations of thunderstorms and lightning in the vicinity of an air base can be derived. A direction-finding cloud-to-ground lightning detection network (LDN) operated by the State Univ. of New York at Albany provided a data base of CG lightning locations in the northeastern United States for July-August, 1986. Copies of the original weather observation forms from 25 AF weather stations in the same area and time period provided a data base of thunderstorm and lightning observations for comparison. The lightning data base was analyzed for strike events located within 15 nm of each weather station. If the 15 minute period lapsed without another strike, the event was ended. Events were categorized as single- or multiple-strike events and the duration of the events tabulated. The weather observation data base was analyzed for thunderstorm events. The beginning time, ending time and duration of the events were tabulated as well as the type of lightning that was reported with each observation. Chronological comparison of the two data bases, using the weather observation data base as 'ground truth', generated 4 X 4 contingency tables of the combinations of thunderstorm-lightning events. Four parameters were derived from the statistical evaluation of the contingency tables: 1) Probability of detection; 2) False alarm rate; 3) Missed threat rate; and 4) Critical success index. Two case studies were performed with the lightning strike data base.
Download or read book FAR AIM 2008 written by United States. Federal Aviation Administration and published by . This book was released on 2007 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adhering to a reputation for excellence, this definitive manual of the latest civil aviation directives has been fully updated and indexed to clearly reflect all the changes in the Federal Aviation Regulations (FAR) and the Aeronautical Information Manual (AIM) over the past year. In addition to the regulations, AIM procedures, and redrawn AIM illustrations, this re-typeset edition also includes a study guide for specific pilot certifications and ratings, a pilot/controller glossary, the NASA Aviation Safety reporting form, important FAA contact information, and a free e-mail service that accounts for regulation changes throughout the publication year. The 2008 edition also includes a combined FAR/AIM index for easy reference.
Download or read book FAA Aviation News written by and published by . This book was released on 1991 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
