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Author : D. S. Cooley
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (381 download)
Download or read book The Use of Weather Satellite Data in Objective Cloud Analysis written by D. S. Cooley and published by . This book was released on 1967 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Roland E. Nagle
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (31 download)
Download or read book The Use of Satellite-observed Cloud Patterns in Northern Hemisphere 500-mb Numerical Analysis written by Roland E. Nagle and published by . This book was released on 1971 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A quasi-objective method for deriving 500-mb geopotential heights with the aid of satellite cloud observations is presented. The method uses satellite-observed cloud patterns in conjunction with a forecast 500-mb height field which is separated into additive short- and long-wave component fields. Empirical relationships between the cloud patterns and the short-wave component field are used to modify the pattern of the latter, and regression equations are used to specify extrema values. The 500-mb heights are retrieved by the direct addition of the modified short-wavelength field to the long-wavelength field. Procedures for using this method operationally are presented, and results of real-time modifications can contribute to significant improvements in the analysis.
Author : Ralph K. Anderson
Publisher :
ISBN 13 :
Total Pages : 356 pages
Book Rating : 4.:/5 (31 download)
Download or read book Application of Meteorological Satellite Data in Analysis and Forecasting written by Ralph K. Anderson and published by . This book was released on 1974 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report represents the combined efforts of personnel of the Applications Group, National Environmental Satellite Center (NESC), now the National Environmental Satellite Service (NESS); the NAVAL AIR SYSTEMS COMMAND Project FAMOS; and the Satellite Section, USAF ENVIRONMENTAL TECHNICAL APPLICATIONS CENTER (ETAC). Topics discussed include the following: Satellite cloud atlas and glossary; Synoptic cloud patterns; Application of satellite data to synoptic analysis in the tropics; Local phenomena; Infrared.
Author : Fred E. Bittner
Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (227 download)
Download or read book Forecasting Horizontal Weather Depiction Fields by Satellite and Numerical Products written by Fred E. Bittner and published by . This book was released on 1971 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes a quasi-objective technique for preparing 24- to 36-hour horizontal weather depiction forecasts, using a blend of numerically produced guidance material and weather satellite data. Relationships between the Fleet Numerical Weather Central (FNWC) 500-mb SD analysis and cloud patterns observed by weather satellites are illustrated. Objective methods for modifying the 500-mb SD progs, based on the satellite-observed cloud patterns, are described. Methods are outlined for forecasting precipitation areas, amounts and types, cloud types and cloud top heights. Verification techniques and results are presented. (Author).
Author : H. Stuart Muench
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.3/5 (91 download)
Download or read book Short-range Forecasting of Cloudiness and Precipitation Through Extrapolation of GOES Imagery written by H. Stuart Muench and published by . This book was released on 1981 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the development and testing of an objective technique to forecast cloudiness and precipitation through extrapolation of satellite imagery. By utilizing on objectively determined cloud-motion vector, the technique makes local forecasts of satellite parameters (brightness and IR temperature), with high temporal resolution, using simple linear extrapolation. Algorithms are then used to convert the satellite parameters to total cloud cover, probability of 1-hour precipitation, and presence of low, middle, and high clouds. The test program computed motion vectors and made forecasts out to 7 hours, in half-hour steps, at 30 locations. The program was tested on 12 spring and fall cases, using half-hourly GOES imagery. For periods beyond 2 hours, forecasts of cloud cover and precipitation were markedly better than persistence, which deficiencies in specification hindered short-period performance. Forecasts of cloud layers were worse than persistence due to inadequate specification algorithms. The net results were quite encouraging, and further refinements and developments are planned.
Author : James T. Williams
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (31 download)
Download or read book Using Satellite Cloud Data as an Aid to Surface Analysis written by James T. Williams and published by . This book was released on 1968 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis made as a demonstration, using only satellite data, shows the essential features of an analysis made from conventional meteorological observations. Some major drawbacks of satellite data are discussed.
Author : D. S. Cooley
Publisher :
ISBN 13 :
Total Pages : 41 pages
Book Rating : 4.:/5 (381 download)
Download or read book The Objective Analysis of Cloud Cover Using Satellite and Surface Data written by D. S. Cooley and published by . This book was released on 1967 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James T. Bunting
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Use of Satellite Data to Map Excessive Cloud Mass written by James T. Bunting and published by . This book was released on 1976 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary report on a method to estimate cloud ice and water content from archived satellite data is presented. The ultimate purpose is the identification and mapping of clouds with excessive mass to produce a climatology for the SAMSO ABRES program. The only suitable archive of satellite data consists of visible and infrared (IR) window measurements taken by scanning radiometers on board NOAA satellites. Starting in 1973, these measurements have been archived digitally each day in 2048 X 2048 arrays covering each hemisphere. In this report, the visible and IR window measurements are related to cloud mass by simultaneous observation of clouds from satellites and aircraft in 11 cases taken in 1974. Additional cases (including 24 in 1975) will be included in subsequent reports. The satellite data and archive are described. Results of the 1974 cases are given in the form of a simple scattergram relating cloud mass integrated through all altitudes to the joint measurements of IR temperature and visible luminance of the cloud. A preliminary application of the scattergram to a cyclonic storm on 23 and 24 July 1973 is made to identify areas of high cloud mass. (Author).
Author : United States Air Weather Service
Publisher :
ISBN 13 :
Total Pages : 223 pages
Book Rating : 4.:/5 (795 download)
Download or read book Application of meteorological satellite data in analysis and forecasting written by United States Air Weather Service and published by . This book was released on 1969 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report furnishes guidance in the interpretation of satellite cloud photographs and presents relationships between the satellite data and meteorological elements and parameters. The material is arranged and presented so that the reader has a quick and easy reference of satellite data to weather analysis and forecasting. A satellite cloud atlas and glossary is included to assist in the identification of cloud types and to define certain applicable terms. This report represents the combined efforts of personnel of the Applications Group National Environmental Satellite Center (NESC); the Naval Air Systems Command Project FAMOS; and the Satellite Section, USAF Environmental Technical Applications Center (ETAC).
Author :
Publisher :
ISBN 13 :
Total Pages : 992 pages
Book Rating : 4.E/5 ( download)
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mary Ann Ruzecki
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Use of Satellite Cloud Photographs in Numerical Weather Prediction written by Mary Ann Ruzecki and published by . This book was released on 1963 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes an alternate approach in which TIROS cloud photographs and nephanalyses are used to modify, in sparse data areas, the stream function field which had been objectively analyzed. The modified analysis is used in the numerical prediction models to compute new height prognoses. The prognoses are then tested to see whether or not an improvement has been made. A case study is described in which this method of reanalysis is utilized. As more sophisticated satellites are launched the coverage of sparse data areas will be much more frequent and complete. It is conceivable that the use of satellite information will become a daily synoptic task. (Author).
Author : Steven Robert Green
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (227 download)
Download or read book Cloud Analysis Using Weather Satellite Images written by Steven Robert Green and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James C. Sadler
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.3/5 (91 download)
Download or read book Utilization of Meteorological Satellite Cloud Data in Tropical Meteorology written by James C. Sadler and published by . This book was released on 1962 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Donald M. Hanson
Publisher :
ISBN 13 :
Total Pages : 55 pages
Book Rating : 4.:/5 (22 download)
Download or read book The Use of Meteorological Satellite Data in Analysis and Forecasting written by Donald M. Hanson and published by . This book was released on 1963 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John H. Conover
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.3/5 (91 download)
Download or read book Specification of Current and Future Cloud Amounts and Ceilings from Satellite Data written by John H. Conover and published by . This book was released on 1975 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective methods and their accuracies for deriving current and six-hour forecasts of cloud amount and ceiling from satellite data are presented. Data from the visible and IR window bands were tested to develop relationships. The IR data did not significantly improve the results. The visible data were carefully calibrated, navigated, and normalized for solar elevation and bidirectional reflectance. Cloud motions were also used for the six-hour forecasts. The data were reduced to values of average brightness and its standard deviation over 1/2 deg by 1/2 deg areas before analysis. RMSE of current cloud amounts (on a scale of 0 to 1) are about 0.25 and for six hours later about 0.35. The occurrence of a ceiling/no ceiling was specified correctly 80% and 70% of the time at zero and six hours, respectively. Various methods are shown for minimization of ceiling errors over different height ranges. In general, RMSE of specified and forecast ceilings range from 4000 to 6000 ft at low levels to 9000 to 10,000 ft at mid and high levels. (Author).
Author : Carlyle H. Wash
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.3/5 (91 download)
Download or read book Studies in Objective Forecasting of Mesoscale Weather Using an Interactive Computer System written by Carlyle H. Wash and published by . This book was released on 1980 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work under this contract involving weather inference from GOES data and weather prediction is summarized. The research involved extrapolation and advection of meteorological events, a statistical study relating GOES data to surface thunderstorm observations, and investigating satellite indicators of short-term changes in surface visibility. (Author).
Author : John P. Barron
Publisher :
ISBN 13 :
Total Pages : 81 pages
Book Rating : 4.:/5 (83 download)
Download or read book An Objective Technique for Arctic Cloud Analysis Using Multispectral AVHRR (Advanced Very High Resolution Radiometer) Satellite Imagery written by John P. Barron and published by . This book was released on 1988 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: An established cloud analysis routine has been modified for use in the Arctic. The separation of clouds from the snow and sea ice backgrounds is accomplished through a multispectral technique which utilizes VHRR channel 2 (visible), channel 3 (near infrared) and channel 4 (infrared) data. The primary means of cloud identification is based on a derived channel 3 reflectance image. At this wavelength, a significant contrast exists between liquid clouds and the arctic backgrounds, unlike in the standard visible and infrared images. The channel 3 reflectance is obtained by first using the channel 4 emission temperature to estimate the thermal emission component of the total channel 3 radiance. This thermal emission component is subsequently removed from the total radiance, leaving only the solar reflectance component available for analysis. Since many ice clouds do not exhibit a substantially greater reflectance is channel 3, the routine exploits differences in transmissive characteristics between channels 3 and 4 for identification. The routine was applied to six case studies which had been analyzed by three independent experts to establish 'ground truth'. Verification of the cloud analysis results, through a comparison to the subjective analyses, yielded impressive statistics. A success rate of 77.9% was obtained with an arguably small data base of 131 undisputed scenes.
