Download or read book Lightning Detection for an Air Force Automated Observation System written by H. Albert Brown and published by . This book was released on 1988 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Force Geophysics Laboratory is conducting an advanced research and development program to develop sensors and techniques to be used in an automated weather observation system. This report concentrates on the progress and plans to automate the observation of one particular weather element: lighting. Since July 1986, AFGL has archived lighting data from the SUNY-Albany Lighting Detection Network (LDN) for the northeastern United States. In an attempt to demonstrate the potential of a commercially-available Remote Display Processor (RDP) coupled with the LDN, a detailed case study was made of a storm that occurred on 10-11 August 1986. The capabilities of the RDP to display the location, motion, and evolution of cloud-to-ground lighting-strike clusters are shown. In addition, some products are shown of software that was developed to track individual lighting-strike clusters, generate their mean position, compute their velocity and maintain a count of strikes per cluster. To illustrate the use of the lighting detection network for observing, we compared network reports and those made by observer. Based on the results, it is apparent that the lighting detection system has great potential as a operational tool for the meteorologist.

Download or read book Lightning Detection for an Air Force Automated Observation System written by H. Albert Brown and published by . This book was released on 1988 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Air Force Geophysics Laboratory is conducting an advanced research and development program to develop sensors and techniques to be used in an automated weather observation system. This report concentrates on the progress and plans to automate the observation of one particular weather element: lighting. Since July 1986, AFGL has archived lighting data from the SUNY-Albany Lighting Detection Network (LDN) for the northeastern United States. In an attempt to demonstrate the potential of a commercially-available Remote Display Processor (RDP) coupled with the LDN, a detailed case study was made of a storm that occurred on 10-11 August 1986. The capabilities of the RDP to display the location, motion, and evolution of cloud-to-ground lighting-strike clusters are shown. In addition, some products are shown of software that was developed to track individual lighting-strike clusters, generate their mean position, compute their velocity and maintain a count of strikes per cluster. To illustrate the use of the lighting detection network for observing, we compared network reports and those made by observer. Based on the results, it is apparent that the lighting detection system has great potential as a operational tool for the meteorologist.

Download or read book Investigation of Sensors and Techniques to Automate Weather Observations written by Eugene Y. Moroz and published by . This book was released on 1977 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several sensors and techniques currently being investigated at the Air Force Geophysics Laboratory as part of its program to automate the observation of weather parameters are described. Included are a lidar cloud-height measuring system, a laser weather identifier, a decision tree approach for determination of present weather, a lidar slant visual range measuring system, and a tower mounted visibility meter approach for determination of slant visual range. (Author)

Download or read book Survey of Sensors for Automated Tactical Weather Observations written by Eugene Y. Moroz and published by . This book was released on 1980 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current requirements for tactical weather systems at fixed and bare- base airfields necessitate an upgrading of meteorological sensor capability, system automation, and a range of data dissemination options. A program has been initiated at the Air Force Geophysics Laboratory to implement these objectives. In the first phase of this program, a survey of the state-of-the-art has been made for the identification of equipment suitable for such a system. Government inventoried instrumentation, as well as those from commercial sources, have been considered. Criteria to be used in sensor selection will include both accuracy and the ability to operate trouble free over a wide range of environmental extremes. When appropriate, in-house programs will be initiated to correct deficiencies. During the coming year, field tests and intercomparisons will be made of selected sensors. Instrumentation will eventually be integrated into an automated system with local and/or remote display of weather elements tailored to user requirements.

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 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 0 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 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 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 48 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 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 0 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 Environmental Research Papers written by and published by . This book was released on with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Reports Awareness Circular TRAC written by and published by . This book was released on 1989 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Data Acquisition for Evaluation of an Airborne Lightning Detection System written by Lawrence C. Walko and published by . This book was released on 1983 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A data acquisition system was flown on a WC-130 aircraft to acquire data for evaluation of the Ryan Stormscope for potential use of such a system on USAF aircraft. The data acquisition system consisted of an instrument panel containing the Stormscope display, an aircraft weather radar display, an IRIG-B time display, and video recording system. Data were acquired during the summer of 1981 in the Florida area during a program conducted jointly by the Air Force Wright Aeronautical Laboratories and the National Oceanographic and Atmospheric Administration for the airborne characterization of lightning. The IRIG-B time reference permitted correlating of the Stormscope data, airborne and ground weather radar data, and electromagnetic measurement data from the lightning characterization program. Typical data acquired are presented along with corresponding data from electromagnetic sensors. A comparative discussion of the daa from the various systems is presented. The data will undergo further analysis sponsored by the Warner Robins Air Logistics Center."--Report documentation page.

Download or read book A Program to Improve Performance of AFGL Air Force Geophysical Laboratory Automated Present Weather Observing Sensors written by D. F. Hansen and published by . This book was released on 1988 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Under a prior Air Force (AFGL) program two prototype Automated Present Weather Sensors were developed. The present program supported hardware and software upgrades Sensors were developed. The present program supported hardware and software upgrades to those sensors which were intended to achieve two objectives. The first and primary objective was to improve the performance capability of the sensors to meet the performance specifications of the NWS-ASOS and FAA-AWOS automated present weather observing systems. The second objective was to provide additional sensor capabilities beyond those required for ASOS/AWOS systems, which improvements would be of value in Air force applications of present weather sensors. Tests made on the sensors after the upgrades were performed, demonstrated their capability to now meet three of the four basic requirements for ASOS/AWOS present weather sensors, namely: (1) precipitation detection, (2) false alarm rate, and (3) precipitation identification. Their ability to meet the fourth requirement; i.e., rainrate accuracy, could not be verified for lack of adequate reference standards. (rh).

Download or read book Precipitation and Lightning Measurements by Polarization Diversity Radar written by James I. Metcalf and published by . This book was released on 1988 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book FYI Lightning Number 39 written by and published by . This book was released on 1997 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air Force Weather (AFW) currently uses a variety of stand-alone lightning mapping systems and regional lightning mapping networks to provide a wide range of support to both the Air Force and the Army. The data from these stand-alone systems and networks enable personnel to warn and advise on lightning hazards, not only for aircraft operations but also resource protection. This FYI provides information on lightning and its effects on operations. It discusses lightning detection systems and forecasting tips that you may want to integrate into your operations to help you warn your customers of lightning hazards.

Download or read book The Federal Plan for Meteorological Services and Supporting Research written by and published by . This book was released on 1972 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: