250 Mhz Ghz Scintillation Parameters In The Equatorial Polar And Auroral Environments
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250 Mhz Ghz Scintillation Parameters In The Equatorial Polar And Auroral Environments
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Author :
language : en
Publisher:
Release Date : 1986
250 Mhz Ghz Scintillation Parameters In The Equatorial Polar And Auroral Environments written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Ionosphere categories.
250 Mhz Ghz Scintillation Parameters In The Equatorial Polar And Auroral Environments
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Author : Santimay Basu
language : en
Publisher:
Release Date : 1986
250 Mhz Ghz Scintillation Parameters In The Equatorial Polar And Auroral Environments written by Santimay Basu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Ionosphere categories.
Ionospheric scintillation effects encountered in the equatorial anomaly crest, polar cap and auroral regions have been contrasted to provide information for the design and evaluation of the performance of satellite communication links in ghese regions. The equatorial anomaly region is identified as the most disturbed irregularity environment where the amplitude and phase structures of VHF/L-band scintillations are primarily dictated by the strength of scattering rather than ionospheric motion. In the anomaly region, the spectra of intense amplitude scintillations at VHF and L-band are characterized by uniform power spectral density from the lowest frequency (10 MHz) to 4 Hz at VHF and to 1 Hz at L-band and steep rolloff at higher fluctuation frequencies with power law indices of -5 to 07. Such structures are compatible with intensity decorrelation times of 0.1 and 0.3 sec at VHF and L-band frequencies, respectively. The phase spectra are described by power law variation of psd with frequency with typical spectral indices of -2. 4. The strong scattering at VHF induces extreme phase rates of 200 deg. in 0.1 sec. The 90th percentile values of rms phase deviation at 250 MHz with 100-sec detrend are found to be 16 rads in the early evening hours whereas amplitude scintillation can cover the entire dynamic range of 30 dB not only at 250 MHz but at L-band as well.
Auroral Dynamics And Space Weather
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Author : Yongliang Zhang
language : en
Publisher: John Wiley & Sons
Release Date : 2015-12-21
Auroral Dynamics And Space Weather written by Yongliang Zhang and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-12-21 with Science categories.
The aurora is the most visible manifestation of the connection of the Earth to the space environment and has inspired awe, curiosity, and scientific inquiry for centuries. Recent advances in observing techniques and modeling and theoretical work have revealed new auroral phenomena, provided a better understanding of auroral dynamics, and have led to an enhanced capability for auroral forecasts. This monograph features discussions of: New auroral phenomena due to the ring current ion and polar rain electron precipitation Various auroral forms and hemispheric asymmetry Auroral model development and MHD simulations Application of the auroral observations for radio absorption and scintillation Aurora nowcast and forecast for space weather operations Auroral Dynamics and Space Weather is a valuable contribution for scientists, researchers, space weather operators, and students of Earth's space environment.
The Effect Of The Ionosphere On Communication Navigation And Surveillance Systems
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Author : John M. Goodman
language : en
Publisher:
Release Date : 1988
The Effect Of The Ionosphere On Communication Navigation And Surveillance Systems written by John M. Goodman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Ionosphere categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1987
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Aeronautics categories.
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.
An Advanced System For Measurement Of Transionospheric Radio Propagation Effects Using Gps Signals
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Author : G. J. Bishop
language : en
Publisher:
Release Date : 1987
An Advanced System For Measurement Of Transionospheric Radio Propagation Effects Using Gps Signals written by G. J. Bishop and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Artificial satellites categories.
An advanced system for measurement of transionospheric radio propagation effects was developed, utilizing the TI-4100 four-channel Global Positioning System (GPS) receiver. During AFGL's Polar ARCS campaign at Sondrestrom, Greenland in February-March 1987, the system successfully measured ionospheric total electron content (TEC), phase scintillation, and amplitude scintillation on both GPS carrier frequencies, from up to four satellites simultaneously. This was the first time it has been possible to measure these parameters simultaneously, in multiple directions, in the high-latitude regions. Coupled with the simultaneous optical and incoherent scatter radar diagnostics obtained during the Polar ARCS campaign, these measurements significantly improve our capability to characterize high latitude ionospheric structures, particularly their temporal and spatial variation. Additionally, the development of this advanced system has contributed significantly to the technology base for specification of the Transionospheric Sensing System (TISS) for the Air Weather Service. The system can also be software upgraded to perform special navigation in addition to ionospheric measurements in airborne applications.
Digital Satellite Navigation And Geophysics
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Author : Ivan G. Petrovski
language : en
Publisher: Cambridge University Press
Release Date : 2012-03-29
Digital Satellite Navigation And Geophysics written by Ivan G. Petrovski and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-03-29 with Technology & Engineering categories.
Your hands-on guide to GNSS theory and applications, with practical case studies and bundled real-time software receiver and signal simulator.
The Ionosphere With Gnss Sdr
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Author : Ivan G. Petrovski II
language : en
Publisher: Springer Nature
Release Date :
The Ionosphere With Gnss Sdr written by Ivan G. Petrovski II and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1987
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Power resources categories.
Government Reports Annual Index
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Author :
language : en
Publisher:
Release Date : 1987
Government Reports Annual Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Research categories.
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.