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Study Of Equatorial Ionospheric Irregularities Using Space Tetheredmulti Point Technique And Coordinated Ground Based Fpi And Scintillation Measurements
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Book Synopsis Study of Equatorial Ionospheric Irregularities Using Space Tethered,multi-point Technique and Coordinated Ground-based FPI and Scintillation Measurements by : Rohini Sarpeshkar Indiresan
Download or read book Study of Equatorial Ionospheric Irregularities Using Space Tethered,multi-point Technique and Coordinated Ground-based FPI and Scintillation Measurements written by Rohini Sarpeshkar Indiresan and published by . This book was released on 2002 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of Equatorial Ionospheric F-region Irregularities and Global Sporadic E- Layers Using Ground-based and Space-based GPS Measurements by : Ankur Nauso Kepkar
Download or read book Studies of Equatorial Ionospheric F-region Irregularities and Global Sporadic E- Layers Using Ground-based and Space-based GPS Measurements written by Ankur Nauso Kepkar and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis EQUION, An Equatorial Ionospheric Irregularity Experiment by : F. A. Morse
Download or read book EQUION, An Equatorial Ionospheric Irregularity Experiment written by F. A. Morse and published by . This book was released on 1976 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes a coordinated rocket and ground based study to investigate Equatorial Spread-F irregularities. Measurements by the Jicamarca backscatter radar, ionosondes, airglow instrumentation and of radio scintillations were correlated with high spatial resolution measurements of electron densities, particle fluxes and VLF-ELF fields from a rocket probe. Experimentally the authors find: (1) Very high positive and negative electron density gradients are responsible for the enhanced radar echoes; (2) Energetic particles are not part of the Spread-F phenomena; (3) wave measurements are strongly correlated with the Doppler character of the radar signals; and (4) That there is a one to one correspondence of the large scale irregularities responsible for scintillations of satellite radio transmissions, and ionosonde spread echoes with the small scale irregularities responsible for the backscatter of VHF radar signals. Implications of the data are discussed.
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 ALTAIR Observations of Ionospheric Irregularities and Background Densities by : David M. Towle
Download or read book ALTAIR Observations of Ionospheric Irregularities and Background Densities written by David M. Towle and published by . This book was released on 1979 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of measurements of the properties of equatorial ionospheric irregularities were made at Kwajalein, M.I. in August 1977 and July-August 1978. These measurements, involved coordinated ground based and in-situ sensors. The ARPA Long-range Tracking and Instrumentation Radar (ALTAIR), obtained backscatter and transmission data during five nights in August 1977 and eight nights in July-August 1978. This report describes the ALTAIR data from the night of 11 August 1978 which yield direct quantitative measurements of 1 m and 3/8 m irregularities and of plasma depleted regions. These plasma depleted regions, previously predicted on the basis of theoretical speculation and in-situ data, appear to be associated with the decay phase and not the generative phase of the field aligned irregularities.
Book Synopsis Equatorial Ionospheric Research Using Satellites and Ground-Based Radar Methods by : Neville J. Skinner
Download or read book Equatorial Ionospheric Research Using Satellites and Ground-Based Radar Methods written by Neville J. Skinner and published by . This book was released on 1972 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ionospheric irregularities in the F region were studied using three techniques; the occurrence of spread-F echoes on ionograms, by direct backscatter recordings at 27.8 MHz and a study of scintillations occurring at SHF frequencies on satellite transmissions. Nairobi ionograms for 1964-70 have been analyzed for spread-F occurrence. Direct backscattered echoes on 27.8 MHz from patches of irregularities in the F-region have been recorded over a twelve-month period. Recordings of SHF transmission from the satellite Intelstat III-F4 were made at the East African Telescommunications Company's station near Nairobi during March - May 1971. (Modified author abstract).
Book Synopsis Analyze and Study Ionospheric Scintillation and Total Electron Content Variability (Ionospheric Studies and TEC Variations). by : Santimay Basu
Download or read book Analyze and Study Ionospheric Scintillation and Total Electron Content Variability (Ionospheric Studies and TEC Variations). written by Santimay Basu and published by . This book was released on 1981 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ionospheric scintillation analyses have been conducted on several fronts, and are discussed here in the light of: (1) recent observations, current theories, and coordinated studies of equatorial scintillations; (2) morphology and analytical formulas at high latitudes; (3) measurements associated with ionospheric heating. F-region irregularities are viewed from the concepts of localized origin of patches, in-situ spectral measurements, and coexistence of km- and m-scale irregularities. The dynamics of equatorial patch formation, motion, and decay are also discussed. Generation of irregularities during underdense heating was observed for the first time. Total electron content data have been utilized to derive the statistics of the variability of ionospheric time delay in the Mediterranean region for the current solar maximum period. The implications of the results on modern satellite ranging systems are discussed. (Author).
Book Synopsis The Size of Low-latitude Ionospheric Irregularities Determined from Observations of Discrete Sources of Different Angular Diameters by : Jules Aarons
Download or read book The Size of Low-latitude Ionospheric Irregularities Determined from Observations of Discrete Sources of Different Angular Diameters written by Jules Aarons and published by . This book was released on 1966 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Remote Sensing of Irregularities in the Equatorial Ionosphere Using the Radio Scintillation Technique by :
Download or read book Remote Sensing of Irregularities in the Equatorial Ionosphere Using the Radio Scintillation Technique written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modelling of Ionospheric Irregularities and Total Electron Content by : S. Basu
Download or read book Modelling of Ionospheric Irregularities and Total Electron Content written by S. Basu and published by . This book was released on 1983 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: F-region irregularities near the equator are viewed from the concept of the temporal structure of UHF scintillations and the electron content depletions associated with VHF, UHF and GHz scintillations. Near the equatorial anomaly crest, the solar cycle effect on GHz scintillation and the depolarization of VHF satellite signals are probed along with electron density irregularities using in-situ data coupled with VHF/GHJz scintillation. Occurrence of nighttime VHF scintillation in the Indian sector near the anomaly is addressed. In the midlatitude sector, coordinated incoherent scatter radar, total electron content and scintillation measurements are studied in the investigation of the generation of km-scale irregularities which spatial variability of total electron content is analyzed in the Mediterranean region. At high latitudes, in-situ measurements provide the opportunity for scintillation modelling which low-energy electron precipitation measurements have been correlated with scintillations/TEC in the auroral oval. The nature of ionospheric irregularities generated by high-power, high-frequency heating has also been investigated and shown to vary between two sites studied.
Book Synopsis Ionospheric Scintillations/TEC and In-situ Density Measurements at an Auroral Location in the European Sector by : Eileen MacKenzie
Download or read book Ionospheric Scintillations/TEC and In-situ Density Measurements at an Auroral Location in the European Sector written by Eileen MacKenzie and published by . This book was released on 1987 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The orbiting HiLat satellite launched in 1983 offered an opportunity for studying ionospheric scintillation parameters in relation to in-situ measurements of ionization density, drift velocity, field-aligned current, and particle precipitation during the sunspot minimum period. This report discusses results of a morphological study based on observations of scintillations and total electron content (TEC) at the auroral oval station at Tromso, Norway, during the period Dec 1983 - Oct 1985. The geometrical enhancement of scintillations observed during alignment of the propagation with the local magnetic L-shell is shown to be the most consistent and conspicuous feature of scintillations in the nighttime auroral oval. The dynamics of the spatial and temporal extent of this region are illustrated in the invariant latitude/magnetic local time grid. Steepening of phase spectral slope in the geometrical enhancement region is indicative of the presence of L-shell aligned sheet-like irregularities at long scale lengths. The seasonal variation of TEC determined from the differential Doppler measurements of HiLat transmissions is discussed in relation to the in-situ density measurements at 830 km. The results are also used to illustrate the dependence of ionospheric structure parameters on short-term variability of solar activity during the sunspot minimum period. This study provides an insight into the nature of magnetospheric coupling with the ionosphere at high latitudes.
Book Synopsis Radio and Optical Techniques for Locating Equatorial Plasma Irregularities by :
Download or read book Radio and Optical Techniques for Locating Equatorial Plasma Irregularities written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies On Ionospheric Irregularities Using Remote Sensing Techniques by : Potula Sree Brahmanandam
Download or read book Studies On Ionospheric Irregularities Using Remote Sensing Techniques written by Potula Sree Brahmanandam and published by . This book was released on 2013-09-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ionospheric Irregularities: Sporadic - E and Spread -F by : Purushottam Bhawre
Download or read book Ionospheric Irregularities: Sporadic - E and Spread -F written by Purushottam Bhawre and published by LAP Lambert Academic Publishing. This book was released on 2016-01-13 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earth is part of solar system and it has some special features, which makes it beautiful and has conditions conducive for the humans to survive on it. It is well known that the main source of energy for the Earth is Sun. So any changes in, of and on the sun, affects the Earth's environment also called as Space weather. Any changes in Earth's atmosphere due to space weather may affect the Earth and in turn, the human life. Like this, there could be many phenomena which could spontaneously occur on the Earth's, in turn affecting the human life directly (seismic activity, variation in Earth's magnetic field, increase in temperature due to greenhouse effect, to name a few)The objective of this book is paying attention to study the short and long term variation over anomaly crest region. The quantitative understanding of low latitude ionosphere is still incomplete. It is needed to explore more therefore. In present work the behavior of characteristics of spread F, sporadic E, variations over the anomaly crest region using some space and ground based experiments. In this work, we are considering the 23rd solar cycle.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722220709 Total Pages :34 pages Book Rating :4.2/5 (27 download)
Book Synopsis Experimental Studies of Ionospheric Irregularities and Related Plasma Processes by : National Aeronautics and Space Administration (NASA)
Download or read book Experimental Studies of Ionospheric Irregularities and Related Plasma Processes written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-05 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Utah State University (USU) continued its program of measuring and interpreting electron density and its variations in a variety of ionospheric conditions with the Experimental Studies of Ionospheric Irregularities and Related Plasma Processes program. The program represented a nearly ten year effort to provide key measurements of electron density and its fluctuations using sounding rockets. The program also involved the joint interpretation of the results in terms of ionospheric processes. A complete campaign summary and a brief description of the major rocket campaigns are also included. Baker, Kay D. Unspecified Center NAG5-603...
Book Synopsis Study of Equatorial Ionospheric Irregularities with ROCSAT-1/IPEI Data for Assessment of Impacts on Communication/Navigation System (IV). by :
Download or read book Study of Equatorial Ionospheric Irregularities with ROCSAT-1/IPEI Data for Assessment of Impacts on Communication/Navigation System (IV). written by and published by . This book was released on 2008 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three tasks completed in this study are presented. (1) The climatologic model of scintillation index S4 map using the ROCSAT data during the moderate to high solar activity period is completed using the ROCSAT 32 Hz density fluctuation data collected at the 600 km altitude. The results are divided into two maps, one for strong scintillation (S4>=0.3) and the other, weak scintillation (S4
Book Synopsis Dynamics of Equatorial Spread F Using Ground-based Optical and Radar Measurements by : Narayan P. Chapagain
Download or read book Dynamics of Equatorial Spread F Using Ground-based Optical and Radar Measurements written by Narayan P. Chapagain and published by . This book was released on 2011 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Earth's equatorial ionosphere most often shows the occurrence of large plasma density and velocity fluctuations with a broad range of scale sizes and amplitudes. These night time ionospheric irregularities in the F-region are commonly referred to as equatorial spread F (ESF) or plasma bubbles (EPBs). This dissertation focuses on analysis of ground-based optical and radar measurements to investigate the development and dynamics of ESF, which can significantly disrupt radio communication and GPS navigation systems. OI (630.0 nm) airglow image data were obtained by the Utah State University all-sky CCD camera, primarily during the equinox period, from three different longitudinal sectors under similar solar flux conditions: Christmas Island in the Central Pacific Ocean, Ascension Island in South Atlantic, and Brasilia and Cariri in Brazil. Well-defined magnetic field-aligned depletions were observed from each of these sites enabling detailed measurements of their morphology and dynamics. These data have also been used to investigate day-to-day and longitudinal variations in the evolution and distribution of the plasma bubbles, and their nocturnal zonal drift velocities. In particular, comparative optical measurements at different longitudinal sectors illustrated interesting findings. During the post midnight period, the data from Christmas Island consistently showed nearly constant eastward bubble velocity at a much higher value (~80 m/s) than expected, while data from Ascension Island exhibited a most unusual shear motion of the bubble structure, up to 55 m/s, on one occasion with westward drift at low latitude and eastward at higher latitudes, evident within the field of view of the camera. In addition, long-term radar observations during 1996-2006 from Jicamarca, Peru have been used to study the climatology of post-sunset ESF irregularities. Results showed that the spread F onset times did not change much with solar flux and that their onset heights increased linearly from solar minimum to solar maximum. On average, radar plume onset occurred earlier with increasing solar flux, and plume onset and peak altitudes increased with solar activity. The F-region upward drift velocities that precede spread F onset increased from solar minimum to solar maximum, and were approximately proportional to the maximum prereversal drift peak velocities.
