Готові списки джерел за темами / Ionospheric radio wave propagation

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Добірка наукової літератури з теми "Ionospheric radio wave propagation"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 29 липня 2024

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Статті в журналах з теми "Ionospheric radio wave propagation"

Li, Qingfeng, Zeyun Li, and Hanxian Fang. "Using 3D Ray Tracing Technology to Study the Disturbance Effect of Rocket Plume on Ionosphere." Atmosphere 13, no. 7 (July 20, 2022): 1150. http://dx.doi.org/10.3390/atmos13071150.

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In this paper, the initial neutral atmospheric parameters, background ionospheric parameters and geomagnetic field parameters of the ionosphere are obtained by NRLMSISE-00 model, IRI-2016 model and IGRF-13 model, respectively. Considering the neutral gas diffusion process, ion chemical reaction and plasma diffusion process, a three-dimensional dynamic model of chemical substances released by rocket plume disturbing the ionosphere is constructed. The influence of the disturbance on the echo path of high frequency radio waves with different incident frequencies is simulated by using three-dimens

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Krasheninnikov, I. V., and V. N. Shubin. "Features of Forecasting the Operation of Ionospheric Radio Lines in Upper Rays Modes." Геомагнетизм и аэрономия 63, no. 4 (July 1, 2023): 473–80. http://dx.doi.org/10.31857/s0016794023600096.

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The frequency dependence of transmitted information qualitative indicators is analyzed on theexample of two meridional radio links: single-hop (~2600 km) and dominant two-hop (~5100 km) for basicmodes of radio wave propagation in the ionosphere. It is shown that the presence of highly efficient receivingtransmittingantennas in a radio communication system leads to the need to take the existence of a priori energeticallyextremely weak modes into account in the problem of radio path specification statement. In thiscase, we consider those formed exclusively by the mechanism of radiation transfer

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Yang, Li-Xia, Chao Liu, Qing-Liang Li, and Yu-Bo Yan. "Electromagnetic wave propagation characteristics of oblique incidence nonlinear ionospheric Langmuir disturbance." Acta Physica Sinica 71, no. 6 (2022): 064101. http://dx.doi.org/10.7498/aps.71.20211204.

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Based on the generalized Zakharov model, a numerical model of electromagnetic wave propagating in the ionosphere at different angles is established by combining the finite difference time domain (FDTD) method of obliquely incident plasma with the double hydrodynamics equation and through equivalently transforming the two-dimensional Maxwell equation into one-dimensional Maxwell equation and the plasma hydrodynamics equation. In this paper. the dominant equation of Z-wave in obliquely incident nonlinear ionospheric plasma having been analyzed and deduced, the FDTD algorithm suitable for calcula

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LaBelle, J. "High-latitude propagation studies using a meridional chain of LF/MF/HF receivers." Annales Geophysicae 22, no. 5 (April 8, 2004): 1705–18. http://dx.doi.org/10.5194/angeo-22-1705-2004.

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Abstract. For over a decade, Dartmouth College has operated programmable radio receivers at multiple high-latitude sites covering the frequency range 100-5000kHz with about a 1-s resolution. Besides detecting radio emissions of auroral origin, these receivers record characteristics of the ionospheric propagation of natural and man-made signals, documenting well-known effects, such as the diurnal variation in the propagation characteristics of short and long waves, and also revealing more subtle effects. For example, at auroral zone sites in equinoctial conditions, the amplitudes of distant tra

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Pavelyev, A. G., Y. A. Liou, K. Zhang, C. S. Wang, J. Wickert, T. Schmidt, V. N. Gubenko, A. A. Pavelyev, and Y. Kuleshov. "Identification and localization of layers in the ionosphere using the eikonal and amplitude of radio occultation signals." Atmospheric Measurement Techniques 5, no. 1 (January 4, 2012): 1–16. http://dx.doi.org/10.5194/amt-5-1-2012.

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Abstract. By using the CHAllenge Minisatellite Payload (CHAMP) radio occultation (RO) data, a description of different types of the ionospheric impacts on the RO signals at the altitudes 30–90 km of the RO ray perigee is given and compared with the results of measurements obtained earlier in the satellite-to-Earth communication link at frequency 1.5415 GHz. An analytical model is introduced for describing propagation of radio waves in a stratified medium consisting of sectors with spherically symmetric refractivity distribution. This model gives analytical expressions for the phase, bending an

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Leyser, Thomas B., H. Gordon James, Björn Gustavsson, and Michael T. Rietveld. "Evidence of <i>L</i>-mode electromagnetic wave pumping of ionospheric plasma near geomagnetic zenith." Annales Geophysicae 36, no. 1 (February 21, 2018): 243–51. http://dx.doi.org/10.5194/angeo-36-243-2018.

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Abstract. The response of ionospheric plasma to pumping by powerful HF (high frequency) electromagnetic waves transmitted from the ground into the ionosphere is the strongest in the direction of geomagnetic zenith. We present experimental results from transmitting a left-handed circularly polarized HF beam from the EISCAT (European Incoherent SCATter association) Heating facility in magnetic zenith. The CASSIOPE (CAScade, Smallsat and IOnospheric Polar Explorer) spacecraft in the topside ionosphere above the F-region density peak detected transionospheric pump radiation, although the pump freq

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Danskin, D. W., A. V. Koustov, T. Ogawa, N. Nishitani, S. Nozawa, S. E. Milan, M. Lester, and D. Andre. "On the factors controlling occurrence of F-region coherent echoes." Annales Geophysicae 20, no. 9 (September 30, 2002): 1385–97. http://dx.doi.org/10.5194/angeo-20-1385-2002.

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Abstract. Several factors are known to control the HF echo occurrence rate, including electron density distribution in the ionosphere (affecting the propagation path of the radar wave), D-region radio wave absorption, and ionospheric irregularity intensity. In this study, we consider 4 days of CUTLASS Finland radar observations over an area where the EISCAT incoherent scatter radar has continuously monitored ionospheric parameters. We illustrate that for the event under consideration, the D-region absorption was not the major factor affecting the echo appearance. We show that the electron dens

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Mabie, Justin, and Terence Bullett. "Multiple Cusp Signatures in Ionograms Associated with Rocket-Induced Infrasonic Waves." Atmosphere 13, no. 6 (June 12, 2022): 958. http://dx.doi.org/10.3390/atmos13060958.

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We are interested in understanding how and when infrasonic waves propagate in the thermosphere, specifying the physical properties of those waves, and understanding how they affect radio wave propagation. We use a combination of traditional ionosonde observations and fixed frequency Doppler soundings to make high quality observations of vertically propagating infrasonic waves in the lower thermosphere/bottom side ionosphere. The presented results are the first simultaneous observations of infrasonic wave-induced deformations in ionograms and high-time-resolution observations of corresponding p

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Riabova, S. A., E. V. Olshanskaya, and S. L. Shalimov. "Response of the Lower and Upper Ionosphere to Earthquakes in Turkey on February 6, 2023." Физика земли 2023, no. 6 (November 1, 2023): 153–62. http://dx.doi.org/10.31857/s0002333723060182.

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Abstract—Ground-based magnetometers and ionospheric radio probing by means of GPS were used to analyze and interpret specific variations of the geomagnetic field and the total electron content of the ionosphere during strong catastrophic earthquakes in Turkey on February 6, 2023. It is shown that the ionospheric responses to these earthquakes recorded at distances of 1200–1600 km from the epicentre in the lower ionosphere and at distances of up to 500 km from the epicentre in the upper ionosphere can be interpreted in terms of the propagation of the Rayleigh seismic wave and atmospheric waves

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Waters, C. L., T. K. Yeoman, M. D. Sciffer, P. Ponomarenko, and D. M. Wright. "Modulation of radio frequency signals by ULF waves." Annales Geophysicae 25, no. 5 (June 4, 2007): 1113–24. http://dx.doi.org/10.5194/angeo-25-1113-2007.

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Abstract. The ionospheric plasma is continually perturbed by ultra-low frequency (ULF; 1–100 mHz) plasma waves that are incident from the magnetosphere. In this paper we present a combined experimental and modeling study of the variation in radio frequency of signals propagating in the ionosphere due to the interaction of ULF wave energy with the ionospheric plasma. Modeling the interaction shows that the magnitude of the ULF wave electric field, e, and the geomagnetic field, B0, giving an e×B0 drift, is the dominant mechanism for changing the radio frequency. We also show how data from high f

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Дисертації з теми "Ionospheric radio wave propagation"

Tshisaphungo, Mpho. "Validation of high frequency propagation prediction models over Africa." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1015239.

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The ionosphere is an important factor in high frequency (HF) radio propagation providing an opportunity to study ionospheric variability as well as the space weather conditions under which HF communication can take place. This thesis presents the validation of HF propagation conditions for the Ionospheric Communication Enhanced Profile Analysis and Circuit (ICEPAC) and Advanced Stand Alone Prediction System (ASAPS) models over Africa by comparing predictions with the measured data obtained from the International Beacon Project (IBP). Since these models were not developed using information on t

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Pathan, Bashir Mohammed. "Studies of low latitude ionosphere through satellite radio wave propagation." Thesis, IIG, 1994. http://localhost:8080/xmlui/handle/123456789/1566.

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Mercer, Christopher Crossley. "The search for an ionospheric model suitable for real-time applications in HF radio communications." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1005274.

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Statement of work: In essence the research work was to focus on the development of an ionospheric model suitable for real time HF frequency prediction and direction finding applications. The modelling of the ionosphere had to be generic in nature, sufficient to ensure that the CSIR could simultaneously secure commercial competitiveness in each of the three niche market areas aforementioned, while requiring only minimal changes to software architecture in the case of each application. A little research quickly showed that the development of an ionospheric model capable of driving a HFDFSSL syst

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De, Larquier Sebastien. "The mid-latitude ionosphere under quiet geomagnetic conditions: propagation analysis of SuperDARN radar observations from large ionospheric perturbations." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/24770.

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The Earth's ionosphere is a dynamic environment strongly coupled to the neutral atmosphere, magnetosphere and solar activity. In the context of this research, we restrict our interest to the mid-latitude (a.k.a., sub-auroral) ionosphere during quiet geomagnetic conditions. The Super Dual Auroral Radar Network (SuperDARN) is composed of more than 30 low-power High Frequency (HF, from 8-18 MHz) Doppler radars covering the sub-auroral, auroral and polar ionosphere in both hemispheres. SuperDARN radars rely on the dispersive properties of the ionosphere at HF to monitor dynamic features of the ion

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Löfås, Henrik. "Ionospheric modification by powerful HF-waves : Underdense F-region heating by X-Mode." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-121898.

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Observations of modifications of the electron temperature in the F-region produced by powerful high-frequency waves transmitted in X-mode are presented. The experiments were performed during quiet nighttime conditions with low ionospheric densities so no reflections occurred. Nevertheless temperature enhancements of the order of 300-400K were obtained. The modifications found can be well described by the theory of Ohmic heating by the pump wave and both temporal and spatial changes are reproduced. A brief overview of several different experimental campaigns at EISCAT facilities in the period

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Botai, Ondego Joel. "Ionospheric total electron content variability and its influence in radio astronomy." Thesis, Rhodes University, 2006. http://hdl.handle.net/10962/d1005258.

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Ionospheric phase delays of radio signals from Global Positioning System (GPS) satellites have been used to compute ionospheric Total Electron Content (TEC). An extended Chapman profle model is used to estimate the electron density profles and TEC. The Chapman profle that can be used to predict TEC over the mid-latitudes only applies during day time. To model night time TEC variability, a polynomial function is fitted to the night time peak electron density profles derived from the online International Reference Ionosphere (IRI) 2001. The observed and predicted TEC and its variability have bee

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Oronsaye, Samuel Iyen Jeffrey. "Updating the ionospheric propagation factor, M(3000)F2, global model using the neural network technique and relevant geophysical input parameters." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1001609.

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This thesis presents an update to the ionospheric propagation factor, M(3000)F2, global empirical model developed by Oyeyemi et al. (2007) (NNO). An additional aim of this research was to produce the updated model in a form that could be used within the International Reference Ionosphere (IRI) global model without adding to the complexity of the IRI. M(3000)F2 is the highest frequency at which a radio signal can be received over a distance of 3000 km after reflection in the ionosphere. The study employed the artificial neural network (ANN) technique using relevant geophysical input parameters

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Habarulema, John Bosco. "A contribution to TEC modelling over Southern Africa using GPS data." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1005241.

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Modelling ionospheric total electron content (TEC) is an important area of interest for radio wave propagation, geodesy, surveying, the understanding of space weather dynamics and error correction in relation to Global Navigation Satellite Systems (GNNS) applications. With the utilisation of improved ionosonde technology coupled with the use of GNSS, the response of technological systems due to changes in the ionosphere during both quiet and disturbed conditions can be historically inferred. TEC values are usually derived from GNSS measurements using mathematically intensive algorithms. Howeve

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Nordblad, Erik. "Opening New Radio Windows and Bending Twisted Beams." Doctoral thesis, Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-158797.

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In ground based high frequency (HF) radio pumping experiments, absorption of ordinary (O) mode pump waves energises the ionospheric plasma, producing optical emissions and other effects. Pump-induced or natural kilometre-scale field-aligned density depletions are believed to play a role in self-focussing phenomena such as the magnetic zenith (MZ) effect, i.e., the increased plasma response observed in the direction of Earth's magnetic field. Using ray tracing, we study the propagation of ordinary (O) mode HF radio waves in an ionosphere modified by density depletions, with special attention t

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Opperman, B. D. L. "Reconstructing ionospheric TEC over South Africa using signals from a regional GPS network." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1005273.

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Radio signals transmitted by GPS satellites orbiting the Earth are modulated as they propagate through the electrically charged plasmasphere and ionosphere in the near-Earth space environment. Through a linear combination of GPS range and phase measurements observed on two carrier frequencies by terrestrial-based GPS receivers, the ionospheric total electron content (TEC) along oblique GPS signal paths may be quantified. Simultaneous observations of signals transmitted by multiple GPS satellites and observed from a network of South African dual frequency GPS receivers, constitute a spatially d

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Книги з теми "Ionospheric radio wave propagation"

Davies, Kenneth. Ionospheric radio. London, U.K: P. Peregrinus on behalf of the Institution of Electrical Engineers, 1989.

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A, Zherebt͡s︡ov G., and Sibirskiĭ institut zemnogo magnetizma, ionosfery i rasprostranenii͡a︡ radiovoln., eds. Fizika ionosfery i rasprostranenii͡a︡ radiovoln: Sbornik nauchnykh trudov. Moskva: "Nauka", 1988.

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A, Zherebt͡s︡ov G., Tashchilin A. V, and Sibirskiĭ institut zemnogo magnetizma ionosfery i rasprostranenii͡a︡ radiovoln., eds. Fizika ionosfery i rasprostranenii͡a︡ radiovoln: Sbornik nauchnykh trudov. Moskva: Nauka, 1989.

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McNamara, L. F. The ionosphere: Communications, surveillance, and direction finding. Malabar, Fla: Krieger Pub. Co., 1991.

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Laboratory), Ionospheric Effects Symposium (6th 1990 Naval Research. The effect of the ionosphere on radiowave signals and system performance: Based on Ionospheric Effects Symposium, 1-3 May 1990. [Washington, DC: U.S. G.P.O., 1990.

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Gurevich, Aleksandr Viktorovich. Long distance propagation of HF radio waves. Berlin: Springer-Verlag, 1985.

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McNamara, L. F. Radio amateurs guide to the ionosphere. Malabar, Fla: Krieger Pub., 1994.

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Rawer, K. Wave propagation in the ionosphere. Dordrecht: Kluwer Academic, 1993.

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S, I͡A︡mpolʹskiĭ V., and Omskiĭ gosudarstvennyĭ pedagogicheskiĭ institut imeni A.M. Gorʹkogo., eds. Radiofizika i issledovanie svoĭstv veshchestva. Omsk: Omskiĭ gos. pedagog. in-t im. A.M. Gorʹkogo, 1990.

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Rawer, Karl. Wave Propagation in the Ionosphere. Dordrecht: Springer Netherlands, 1993.

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Частини книг з теми "Ionospheric radio wave propagation"

Rawer, Karl. "Propagation of radio waves in a cold magnetoplasma." In Wave Propagation in the Ionosphere, 53–66. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-3665-7_7.

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Larsen, Trygve R. "Irregular Variations in the High Latitude Ionosphere and their Effects on Propagation." In ELF-VLF Radio Wave Propagation, 171–85. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-010-2265-1_14.

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Rawer, Karl. "Refraction of radio waves in a plasma. Simplest case." In Wave Propagation in the Ionosphere, 7–18. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-3665-7_2.

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Gurevich, Alexsandr V., and Elena E. Tsedilina. "Regularities of Very Long-Distance Radio Wave Propagation in the Ionosphere." In Physics and Chemistry in Space, 71–119. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70249-5_4.

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Dorman, Lev I. "Air Ionization by CR, Influence on the Ionosphere and Radio Wave Propagation." In Astrophysics and Space Science Library, 541–72. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2113-8_12.

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Pal, Sujay. "Remote Sensing of the Ignorosphere: Need for a Complete Earth-Ionosphere Radio Wave Propagation Model." In Astrophysics and Space Science Proceedings, 527–43. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94607-8_41.

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Basak, Tamal. "Quantitative Modeling of Lower Ionospheric Response Due to Solar X-ray Flare: A Propagating Radio Wave Simulation Approach." In Astrophysics and Space Science Proceedings, 561–70. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94607-8_43.

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Akinian, S. T., E. I. Mogilevskii, and V. V. Fomichev. "Radio Astronomy Studies of the Sun at the Institute of Terrestrial Magnetism, the Ionosphere and Radio-Wave Propagation of the USSR Academy of Sciences." In A Brief History of Radio Astronomy in the USSR, 225–29. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-2834-9_10.

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Smol’kov, G. Y. "The Birth and Development of Radio Astronomy Studies of the Sun at the Siberian Institute of Terrestrial Magnetism, the Ionosphere and Radio-Wave Propagation." In A Brief History of Radio Astronomy in the USSR, 231–36. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-2834-9_11.

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Cander, Ljiljana R. "Ionosphere Space Weather and Radio Propagation." In Ionospheric Space Weather, 197–243. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99331-7_8.

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Тези доповідей конференцій з теми "Ionospheric radio wave propagation"

Bakhmet'eva, Natalia, Valery Vyakhirev, Elena Kalinina, Ilya Zhemyakov, and Grigory Vinogradov. "Vertical Motions in the Lower Ionosphere and Dynamics of the Ionospheric Plasma." In 2019 Russian Open Conference on Radio Wave Propagation (RWP). IEEE, 2019. http://dx.doi.org/10.1109/rwp.2019.8810386.

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Deminov, Marat G., and Rafael G. Deminov. "Geomagnetic Index for Intense Ionospheric Storm." In 2019 Russian Open Conference on Radio Wave Propagation (RWP). IEEE, 2019. http://dx.doi.org/10.1109/rwp.2019.8810384.

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Guo, Qiang, Leonid F. Chernogor, Konstantin P. Garmash, Yiyang Luo, Victor T. Rozumenko, and Yu Zheng. "Ionospheric Disturbances and Their Impacts on HF Radio Wave Propagation." In 2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS). IEEE, 2021. http://dx.doi.org/10.23919/ursigass51995.2021.9560548.

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Ma Bao-Ke and Guo Li-Xin. "Study on scintillation of radio wave propagation through the ionospheric irregularities." In 2008 8th International Symposium on Antennas, Propagation & EM Theory (ISAPE - 2008). IEEE, 2008. http://dx.doi.org/10.1109/isape.2008.4735230.

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Maltseva, O. A., N. S. Mozhaeva, T. V. Nikitenko, and T. T. Quang. "HF radio wave propagation in conditions of prolonged low solar activity." In 12th IET International Conference on Ionospheric Radio Systems and Techniques (IRST 2012). IET, 2012. http://dx.doi.org/10.1049/cp.2012.0402.

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Repin, Andrey, Mikhail Anishin, Boris Barabashov, Dmitry Demin, Valentina Denisova, Sergey Zhuravlev, Nadezhda Kotonayeva, and Konstantin Tsybulya. "The Long- and Short-Term Ionospheric Forecast Service for the Shortwave Propagation." In 2019 Russian Open Conference on Radio Wave Propagation (RWP). IEEE, 2019. http://dx.doi.org/10.1109/rwp.2019.8810196.

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Ratovsky, Konstantin G., Maxim V. Klimenko, Yury V. Yasyukevich, and Vladimir V. Klimenko. "Statistical Analysis of Ionospheric Global Electron Content Response to Geomagnetic Storms." In 2019 Russian Open Conference on Radio Wave Propagation (RWP). IEEE, 2019. http://dx.doi.org/10.1109/rwp.2019.8810392.

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Ivanova, V. A., V. I. Kurkin, and V. A. Ivanov. "Peculiarities of the HF radio wave propagation over round-the-world paths." In IET 11th International Conference on Ionospheric Radio Systems and Techniques (IRST 2009). IEE, 2009. http://dx.doi.org/10.1049/cp.2009.0081.

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Khristoforov, Stanislav, and Vladimir Bochkarev. "Estimation of Geomagnetic and Solar Indices by Global Ionospheric Maps With Use of Neural Networks." In 2019 Russian Open Conference on Radio Wave Propagation (RWP). IEEE, 2019. http://dx.doi.org/10.1109/rwp.2019.8810207.

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Nguyen, Bach T., and Jamesina J. Simpson. "A stochastic FDTD model of electromagnetic wave propagation in magnetized ionospheric plasma." In 2013 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium). IEEE, 2013. http://dx.doi.org/10.1109/usnc-ursi.2013.6715363.

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Звіти організацій з теми "Ionospheric radio wave propagation"

Tawk, Youssef, and Christopher Romero. Millimeter Wave Radio Frequency Propagation Model Development. Fort Belvoir, VA: Defense Technical Information Center, August 2014. http://dx.doi.org/10.21236/ada609960.

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Kersley, L., S. E. Pryse, and N. S. Wheadon. Radio-Wave Scintillations and Ionospheric Irregularities at High Latitudes. Fort Belvoir, VA: Defense Technical Information Center, May 1987. http://dx.doi.org/10.21236/ada192140.

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Argo, P. E., D. DeLapp, C. D. Sutherland, and R. G. Farrer. Tracker: A three-dimensional raytracing program for ionospheric radio propagation. Office of Scientific and Technical Information (OSTI), December 1994. http://dx.doi.org/10.2172/10196580.

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Barrios, A. E. Radio Wave Propagation in Horizontally Inhomogeneous Environments by Using the Parabolic Equation Method. Fort Belvoir, VA: Defense Technical Information Center, May 1991. http://dx.doi.org/10.21236/ada242082.

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Heinz, Brian J., David Richie, Song J. Park, and Dale R. Shires. Real-Time Radio Wave Propagation for Mobile Ad-Hoc Network Emulation and Simulation Using General Purpose Graphics Processing Units (GPGPUs). Fort Belvoir, VA: Defense Technical Information Center, May 2014. http://dx.doi.org/10.21236/ada601670.

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