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Ionospheric Scintillation Predictions For Goes
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Book Synopsis Ionospheric Scintillation Predictions for GOES by : Joseph Horace Pope
Download or read book Ionospheric Scintillation Predictions for GOES written by Joseph Horace Pope and published by . This book was released on 1973 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A world-wide model of ionospheric irregularities giving rise to scintillations was developed by Fremouw and Rino of Stanford Research Institute. This model takes into consideration diurnal, seasonal, and solar variations. Also considered is the dependence on geomagnetic latitude, frequency, and the geometry between the transmitter and the receiver. This model was used to make computations appropriate for the GOES system, assuming the satellite to be parked on 100°W longitude. Calculations were made at 400 MHz for sunspot numbers 30, 100, and 200, coo responding to low, medium, and high solar activity; for solstice and equinoctial periods; and for several times of the day. The results are presented as contour maps of the earth as viewed from GOES. The results show that for low solar activity periods serious scintillations will occur only within about ± 10 degrees of the geomagnetic equator. During moderately active periods stations located in the vicinity of the auroral zones will also be affected. The worst case condition occurs for sunspot number 200, during the equinox, and at midnight , on the longitude of the geostationary satellite. In general, the mid-latitude regions are relatively free from scintillations. These results should be useful in determining the positioning and programming of the data readout of the numerous surface-based stations to be used in connection with the data collection and relay subsystem.
Book Synopsis Ionospheric Scintillation Predictions for ATS-F at 40 and 360 MHz by : Joseph Horace Pope
Download or read book Ionospheric Scintillation Predictions for ATS-F at 40 and 360 MHz written by Joseph Horace Pope and published by . This book was released on 1973 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Prediction of Ionospheric Conditions by : G.S. Ivanov-Kholodny
Download or read book The Prediction of Ionospheric Conditions written by G.S. Ivanov-Kholodny and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ionosphere of the Earth has been actively studied since the 1920's, following the discovery of ground radio-sounding. By means of this method results were ohtained by an international network of ionospheric stations, in particular, by the successful implementation of a number of rigorously planned international scientific research programs,'" enabling the collection of extensive experimental material on some of the most important parameters of the ionosphere - the critical freLjuencies of E-, Fl and F2-layers. Comprehensive analyses of these observation data give a fairly complete picture of the various changes taking place in the principal ionospheric layers at different points on our globe. Another important aspect of the study of the ionosphere, which has been in progress for the past three decades, is an extensive program of in situ determinations of the various physical parameters - first using rockets, and subsequently artificial satellites. The data thus obtained on the principal ionizing agent - short-wave solar radiation - and on the physical conditions prevailing in the upper atmosphere and in the ionosphere at different altitudes, allow the proposal of a self-consistent mechanism of ionosphere formation. A general outline of the theory of ionosphere formation at different altitudes is now complete. Its application to specific cases, dependent on a more accurate determination of input parameters to give solutions valid for a definite set of conditions etc., is yet to be accomplished. The use of artificial satellites in cosmic research yielded abundant scientific data.
Book Synopsis Ionospheric Predictions for ... by :
Download or read book Ionospheric Predictions for ... written by and published by . This book was released on 1963 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ionospheric Prediction and Forecasting by : Bruno Zolesi
Download or read book Ionospheric Prediction and Forecasting written by Bruno Zolesi and published by Springer Science & Business Media. This book was released on 2013-09-25 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes how to predict and forecast the state of planet Earth’s ionosphere under quiet and disturbed conditions in terms of dynamical processes in the weakly ionized plasma media of the upper atmosphere and their relation to available modern measurements and modelling techniques. It explains the close relationship between the state of the media and the radio wave propagation conditions via this media. The prediction and forecasting algorithms, methods and models are oriented towards providing a practical approach to ionospherically dependent systems design and engineering. Proper understanding of the ionosphere is of fundamental practical importance because it is an essential part of telecommunication and navigation systems that use the ionosphere to function or would function much better in its nonappearance on the Earth and on any planet with an atmosphere.
Book Synopsis Prediction of Ionospheric Scintillations for Sattelite Signals in Communications and Navigations by : H. J. Albrecht
Download or read book Prediction of Ionospheric Scintillations for Sattelite Signals in Communications and Navigations written by H. J. Albrecht and published by . This book was released on 1971 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Global Morphology of Ionospheric Scintillations II by : Jules Aarons
Download or read book Global Morphology of Ionospheric Scintillations II written by Jules Aarons and published by . This book was released on 1975 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Updating a review of the global morphology of ionospheric scintillations published in 1971, this study adds additional experimental studies on familiar topics to newer types of measurements of ionospheric irregularities, including in situ experiments and artificial heating of the F-layer.
Book Synopsis Ionospheric Predictions by : Institute for Telecommunication Sciences
Download or read book Ionospheric Predictions written by Institute for Telecommunication Sciences and published by . This book was released on 1971 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ionospheric Prediction and Forecasting by : Bruno Zolesi
Download or read book Ionospheric Prediction and Forecasting written by Bruno Zolesi and published by Springer. This book was released on 2016-08-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes how to predict and forecast the state of planet Earth’s ionosphere under quiet and disturbed conditions in terms of dynamical processes in the weakly ionized plasma media of the upper atmosphere and their relation to available modern measurements and modelling techniques. It explains the close relationship between the state of the media and the radio wave propagation conditions via this media. The prediction and forecasting algorithms, methods and models are oriented towards providing a practical approach to ionospherically dependent systems design and engineering. Proper understanding of the ionosphere is of fundamental practical importance because it is an essential part of telecommunication and navigation systems that use the ionosphere to function or would function much better in its nonappearance on the Earth and on any planet with an atmosphere.
Book Synopsis Ionospheric Predictions by : Australia. Ionospheric Prediction Service
Download or read book Ionospheric Predictions written by Australia. Ionospheric Prediction Service and published by . This book was released on 1956* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Global Morphology of Ionospheric Scintillations by : Jules Aarons
Download or read book Global Morphology of Ionospheric Scintillations written by Jules Aarons and published by . This book was released on 1970 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amplitude fluctuations produced by small irregularities in electron density in the F-layer of the ionosphere (at 300 to 400 km height) can be a problem to communication and navigation systems in the VHF-UHF range. Recent measurements, primarily by AFCRL, are shown with emphasis on results at high and equatorial latitudes. At high latitudes an irregularity region exists whose lower boundary reaches 57 degrees invariant latitude near midnight. During magnetic storms the boundary descends to lower latitudes and the fading becomes deeper. Over the polar cap scintillations are somewhat diminished. When observing synchronous satellites through the irregularity region, deep and fast fading is frequently seen, with fade rates to one per second. Irregularities produce deep scintillations in the VHF range plus or minus 15 degrees from the geomagnetic equator. In equatorial regions maximum occurrence of high level scintillations takes place between 2100 and 2400 local time during the equinoxes; a minimum occurrence is observed during the solstices. When the sunspot number decreases, the equatorial irregularity region spreads and becomes larger. The data for various latitudes has been placed in statistical form, that is, distribution of amplitudes for 15-min samples as well as for periods of 1 yr and longer. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ionospheric Scintillation Modeling Needs and Tricks by : Shishir Priyadarshi
Download or read book Ionospheric Scintillation Modeling Needs and Tricks written by Shishir Priyadarshi and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The wavelength of the radio-wave satellite signal is of the order of the minimal small-scale ionospheric irregularities (i.e., a few centimeters). As the satellite signal passes through the ionosphere, its interaction with the ionospheric irregularity structures causes refraction, reflection, and polarization in the satellite signal. Ionospheric irregularities degrade the trans-ionospheric radio-wave signal quality, between the satellite and the receivers, due to scintillation. The physics-based model often fails to produce global morphology during the extreme solar events, whereas empirical models based on the ionospheric scintillation data demonstrate better quality to forecast the scintillation effects during extreme solar event. It is really tricky to make a scintillation model that is sensitive to low and high solar activities as well as extreme solar events simultaneously. In the presented book chapter, we will discuss/review the needs and tricks of modeling ionospheric scintillation during extreme solar events as well as all weather and latitudinal cases. There are several aspects that influence the scintillation occurrence, its strength, and global distribution. The latitudinal dependence, local weather, solar/geomagnetic activity conditions, and local times are the widely accepted factors that control and influence ionospheric scintillation most. This book chapter discusses all these aspects and also suggests the ways to cast aside those factors that led to the wrong measure of scintillation indices.
Download or read book Beyond Land written by Shivani and published by Tredition Gmbh. This book was released on 2024-05-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Imagine navigating the vast expanse of the South Atlantic Ocean, where traditional methods like land-based stations can't reach. Here's where a groundbreaking approach emerges: using a mobile GNSS (Global Navigation Satellite System) receiver to explore "ionospheric scintillation" in this remote region. Ionospheric scintillation is a rapid fluctuation in radio signals caused by variations in electron density within the upper atmosphere. The South Atlantic Anomaly (SAA), a region with a weakened magnetic field, intensifies this phenomenon. For navigation systems like GPS, scintillation can lead to errors or even signal loss. Traditionally, studying scintillation relied on land-based receivers, leaving vast ocean areas unexplored. This mobile GNSS receiver mounted on a research vessel ventures into the heart of the SAA, collecting real-time data on scintillation intensity and its effects on GNSS signals. This groundbreaking approach offers several advantages. It allows scientists to map the spatial extent of scintillation within the SAA, creating a more comprehensive picture of this phenomenon. By studying how scintillation intensity varies across the region, scientists can refine prediction models for safer navigation. Furthermore, a mobile receiver can capture the dynamic nature of scintillation. Unlike land-based stations with fixed locations, the mobile receiver offers a continuous stream of data, revealing how scintillation intensity changes over time. This data is crucial for understanding how scintillation events evolve and their potential impact on GNSS users. The information gleaned from such expeditions paves the way for improved navigation in the South Atlantic. By understanding scintillation patterns, mitigation strategies like using multiple frequencies or real-time signal correction techniques can be developed. Ultimately, venturing "beyond land" with a mobile GNSS receiver is a critical step towards ensuring safe and reliable navigation in this challeng
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1975 with total page 2834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Proposed Index for Measuring Ionospheric Scintillation by : H. E. Whitney
Download or read book A Proposed Index for Measuring Ionospheric Scintillation written by H. E. Whitney and published by . This book was released on 1968 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Signals from radio star sources and satellites are regularly used for studying ionospheric irregularities. Amplitude and phase deviations can be imposed on the signals from these sources as they traverse the ionosphere. A parameter frequently used to describe the magnitude of this scintillation effect is scintillation index. An experiment was designed to correlate various methods of making scintillation measurements; observations were made at 40 MHz using the ionospheric beacon, S-66. It is shown that when the law of the receiver detector is known, a conversion method allows comparison of data and statistics on scintillation index. A simplified method of scaling scintillation index is described. The accuracy of the simplified method is determined by a comparison with measurements of scintillation index by machine computation.
Download or read book Ionospheric Predictions written by and published by . This book was released on 1970 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
