Download or read book Scintillation Studies Using the Early Bird Synchronous Satellite 136 MHz Signal written by Frederick F. Slack and published by . This book was released on 1967 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three-station receiving network was established for receiving VHF radio signals from a synchronous satellite for the purpose of studying scintillations in the upper atmosphere. The results obtained with a narrow-beam high-gain antenna and those obtained with a wide-beam antenna during a 5-hr nighttime scintillating period were compared. Stations using four-element Yagis with 40 degrees beamwidths measured scintillation index values that varied from 2 percent to 90 percent. The AFCRL Sagamore Hill Radio Observatory receiving station, using a 150-ft antenna with a 4 degree beamwidth, measured scintillation index values that were quite consistently about 50 percent of the values obtained with Yagis. For part of the scintillating period, an 84-ft antenna with a 7 degree beamwidth was used in addition to the 150-ft antenna; the recorded pattern was almost identical with the pattern produced by the other narrow-beam antenna but the scintillation index values were about 66 percent of the Yagi values. (Author).

Download or read book Scintillation Studies Using the Early Bird Synchronous Satellite 136 mhz Signal written by and published by . This book was released on 1967 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: A three-station receiving network was established for receiving VHF radio signals from a synchronous satellite for the purpose of studying scintillations in the upper atmosphere. The results obtained with a narrow-beam high-gain antenna and those obtained with a wide-beam antenna during a 5-hr nighttime scintillating period were compared. Stations using four-element Yagis with 40 degrees beamwidths measured scintillation index values that varied from 2 percent to 90 percent. The AFCRL Sagamore Hill Radio Observatory receiving station, using a 150-ft antenna with a 4 degree beamwidth, measured scintillation index values that were quite consistently about 50 percent of the values obtained with Yagis. For part of the scintillating period, an 84-ft antenna with a 7 degree beamwidth was used in addition to the 150-ft antenna; the recorded pattern was almost identical with the pattern produced by the other narrow-beam antenna but the scintillation index values were about 66 percent of the Yagi values. (Author).

Download or read book Scintillation of Synchronous Satellite Transmissions at 136MHz written by Jules Aarons and published by . This book was released on 1968 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the aim of studying techniques for using the upper portion of the VHF band for communications and navigation, a series of experimental synchronous satellites has been launched. This preliminary survey aimed to add data on scintillations of signals at 136 MHz and to standardize methods of reducing results from a number of European observing stations. Initial qualitative results show that invariant latitude and conjugate point effects may play important roles in the scintillation process. (Author).

Download or read book Environmental Research Papers written by and published by . This book was released on 1967 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book OAR Cumulative Index of Research Results written by and published by . This book was released on 1967 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 1970 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Survey of Scintillation Data and Its Relationship to Satellite Communications written by Jules Aarons and published by . This book was released on 1970 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: VHF atmospheric studies and communications and navigation systems; The definition of scintillation index and its use for characterizing ionospheric effects; Summary of properties of F-region irregularities; Application of the statistics of ionospheric scintillation to VHF and UHF systems; Special problems in scintillations; and Propagation delays of VHF waves.

Download or read book Report Upper Atmosphere Geophysics written by and published by . This book was released on 1970 with total page 872 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 1969 with total page 1508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research Development Reports written by and published by . This book was released on 1969 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1968 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report UAG written by and published by . This book was released on 1969 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Government Research and Development Reports Index written by and published by . This book was released on 1968 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Scientific Industrial Research written by and published by . This book was released on 1971 with total page 566 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 1968 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atmospheric Transport Processes written by Elmar R. Reiter and published by . This book was released on 1971 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Index written by and published by . This book was released on 1968 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: