2 edition of Topside ionosphere electron density concentration found in the catalog.
Topside ionosphere electron density concentration
1969 by Massachusetts Institute of Technology, Planetary Circulations Project in Cambridge, Mass .
Written in English
|LC Classifications||QC851 .M134 no. 23|
|The Physical Object|
|Number of Pages||201|
|LC Control Number||77016220|
P. Sibanda and L. A. McKinnell: Topside ionospheric vertical electron density proﬁle reconstruction the section that follows resulting in a proﬁle that is unique to a speciﬁc set of geophysical conditions. Therefore, the focus of the present study is on the ability to construct the shape of the electron density in the vertical. As mentioned before, an increase in the ionospheric electron density or in the VTEC can be also provoked by storm-time-enhanced neutral winds and the consequent ionospheric uplift, by downwelling of the gas due to storm-time-induced thermospheric circulation (i.e., increase in the O/N2 ratio), as well as by plasma fluxes from plasmasphere (e.g Cited by: Therefore, after the bottomside electron density profile of ionosphere has been precisely measured by an ionosonde, the corresponding PolSAR TEC can be used to calculate the TEC Top for the ionosonde. Resorting to Equation (9), we can derive the parameter H T. Then, the topside profile could be easily calculated from Equation (3).Cited by: 2. A model is presented for the thickness of the electron density profile in the region above the F layer maximum. The model varies with time and solar conditions; it is specified by observations or predictions of the height of the F layer maximum; and it is independent of latitude.
Space weather deposits energy into the high polar latitudes, primarily via Joule heating that is associated with the Poynting flux electromagnetic energy flow between the magnetosphere and ionosphere. One way to observe this energy flow is to look at the ionospheric electron density profile (EDP), especially that of the topside. The altitude location of the ionospheric peak Author: Jan J. Sojka, Donald Rice, Vince Eccles, Michael David, Robert W. Schunk, Robert Frederick Benson, H.
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Based on the DMSP data after critical data quality check, we used the artificial neuron network method to derive the long‐term trend of the topside (~ km) ionospheric electron density (N e) around 18 MLT.
We obtained, for the first time, the global, long‐term trend map of N : Yihui Cai, Xinan Yue, Wenbin Wang, Shunrong Zhang, Libo Liu, Huixin Liu, Weixing Wan. The reconstructed electron density profiles have been validated by running the standard ionospheric empirical model Topside ionosphere electron density concentration book Reference Ionosphere, IRI) at time and locations that RO electron density profiles are obtained.
The results show well agreement between the Abel inversion and IRI electron density profiles, for both Author: Bizuayehu Adisie Beyene. TOPSIDE IONOSPHERE ELECTRON DENSITY CONCENTRATION: OBSERVATION AND THEORY by Mao-Fou Wu Submitted to the Department of Meteorology on Octo in partial fulfillment of the requirment for the degree of Doctor of Philosophy.
ABSTRACT The ionospheric F-region is noted for its many anomalies, which. New Vary-Chap profile of the topside ionosphere electron density distribution for use with the IRI model and the GIRO real time data Patrick Nsumei,1 Bodo W. Reinisch,1,2 Xueqin Huang,1 and Dieter Bilitza3,4 Received 26 January ; revised 30 March ; accepted 3 April ; published 17 May Cited by: The existing uncertainties about the electron density profiles in the topside ionosphere, i.e., in the height region from h m F 2 to ~ km, require the search for new data Topside ionosphere electron density concentration book.
60 The Topside Ionosphere is the name given to the rest 10 2 1 03 10 6 10 7 1 0 8 of the ionosphere above the F Topside ionosphere electron density concentration book peak.
In a simple DENSITY (cm-3) model of the ionosphere, the density of the topside iono-Figure Total ionization profile with ionospheric layers. sphere decreases exponentially with height with some char. The existing uncertainties about the electron density profiles in the topside ionosphere, i.e., in the height region from h m F 2 to ~ km, require the search for new data sources.
The ISIS and Alouette topside sounder satellites from the sixties to the eighties recorded millions of ionograms but most were not analyzed Topside ionosphere electron density concentration book terms of electron Cited by:  A simple model for the topside ionosphere region is introduced and applied to fit radio‐occultation‐retrieved electron density profiles for altitudes above the F2 peak.
The model considers two isothermal components representing the population of the O + (ionosphere component) and the H + (protonosphere component) ions. The purpose of the model is to. The NeQuick ionospheric electron density model has a very simple topside formulation, which allows taking into account the electron content up to 20, by: 7.
Improvements of the International Reference Ionosphere model for the topside electron density profile Dieter Bilitza,1 Bodo W. Reinisch,2 Sandro M. Radicella,3 Sergey Pulinets,4 Tamara Gulyaeva,5,6 and Lida Triskova7 Received 7 September ; revised 5 December ; accepted 11 January ; published 18 April Cited by: Abstract: Summary form only given.
The ionosphere-plasmasphere region of Earth's environment extends from ~60 km altitude above the surface to a geocentric distance of roughly 4 R wave propagation in this region is predominantly controlled by the electron density distribution and the geomagnetic field.
Anthony J. Mannucci, Bruce T. Tsurutani, in Extreme Events in Geospace, 5 Conclusions and Future Outlook. The largest increases in ionospheric electron density and total electron content during intense geomagnetic storms are due to prompt penetration electric fields (PPEF), that tend to occur during the Topside ionosphere electron density concentration book main phase, and Topside ionosphere electron density concentration book last for several hours.
Modeling the topside ionosphere by means of electron density values as recorded by the Swarm satellites constellation Article (PDF Available) in Il Nuovo Cimento C. Estimating Electron Density of the Ionosphere from Radio Occultation TEC Data using Abel Topside ionosphere electron density concentration book - Kindle edition by Adisie Beyene, Bizuayehu.
Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Estimating Electron Density of the Ionosphere from Radio Occultation TEC Price: $ Ionospheric topside models compared with experimental electron density profiles Fig.
Comparison of topside TEC, IRI model: percent difference for months groups 1 and 2. Numbers indi-cate the amount of data.
Fig. Comparison of electron density, NeQuick model, at km above hmF2 for months groups 1 and 2. Numbers indicate the amount of. Topside O+ H+ O+ O2 + NO Density: Altitude in km Hmax Nmax Figure 2. Various layers of the ionospher e and their predominant ion populations ar e listed at their respective heights above gr ound.
The density in the ionosphere varies considerably, as shown. F2 Layer D Region Electrons/cm3 lowest is the D-region, covering altitudes be-File Size: KB. Regardless the longitudinal effect in ionosphere was reported many years ago (Ben’kova et al., ), there were no presented up to now the global distribution of the electron concentration in the topside ionosphere which takes into account the longitudinal by: 1.
Background Significance of topside ionospheric electron-density profile. Technology has advanced to the state that uncertainties in ionospheric models and the effects of ionospheric irregularities and disturbances are often the limiting factors in the overall performance of communication, navigation and surveillance systems since they rely on Cited by: 9.
Electron density in the topside ionosphere has significant variations with latitude, longitude, altitude, local time, season, and solar cycle. This paper focuses on the global and seasonal features of longitudinal structures of daytime topside electron density (Ne) at middle latitudes and their possible by: 2.
The ionosphere (/ aɪ ˈ ɒ n ə ˌ s f ɪər /) is the ionized part of Earth's upper atmosphere, from about 60 km (37 mi) to 1, km ( mi) altitude, a region that includes the thermosphere and parts of the mesosphere and ionosphere is ionized by solar radiation. It plays an important role in atmospheric electricity and forms the inner edge of the magnetosphere.
Note that in this work, we used data from DEMETER at almost a fixed orbit height of ~ km. Thus, the satellite sampled the topside ionosphere where electron density decreases with plasma scale height and electron temperature increases.
 The correlation between the electron temperature (T e) and electron density (N e) at km height at magnetic dip latitudes (MLat) less than about ±40° measured by the Hinotori satellite from February to June is presented. The results show the well‐known negative correlation between daytime N e and T e when N e is by:  In this paper, the 10‐year (–) measurements of total ion density (N i) from the Defense Meteorological Satellite Program (DMSP) spacecraft at and LT have been analyzed to investigate the yearly variations of global plasma densities in the topside ionosphere at magnetic latitudes from 60°S to 60°s indicate that there are strong Cited by: The Topside Ionosphere Plasma Monitor (SSIE) is an operational system flown on the Block 5D F2 DMSP Satellite for transmission of continuous data on the state of the topside ionosphere.
The instrument consists of separate electron and ion sensors mounted on a ft boom deployed after spacecraft attitude has been stabilized in orbit. This report describes the two sensors, Cited by: 9. Data obtained by means of the ionospheric topside sounder satellite Alouette-1 show that in the daytime the seasonal anomaly in the electron, concentration extends to heights above h m F2 in a manner which depends on the latitude.
In the northern hemisphere over the American continent the anomaly extends to heights near km at geographic latitudes between 46 and 53° by: 6. The sunrise behavior of the midlatitude topside ionosphere at low sunspot numbers was examined by using Alouette 1 electron density and plasma scale height profiles obtained at Stanford University during May and June Under the assumption that observed variations result from solar control, the data were averaged to form height profiles of plasma scale height and electron density Cited by: 5.
In this paper, the bottom-side electron density profiles derived from ground based ionosonde data and the ROCSAT-1 in-situ electron density data were used to determine the estimates of the topside. Radicella and Zhang () presented an improved version of the profiler able to give the electron density distribution on both the bottom and topside of the ionosphere and the ionospheric total.
F2-layer peak electron density, peak height and electron density at ROCSAT altitudes (≈ km) are used to derive the effective scale heights (HT) of the topside ionosphere during the period. Electron densities and temperatures as well as omnidirectional fluxes of hyperthermal positive ions (E = 28 eV) were measured by means of spherical Langmuir probes aboard INJUN 5 at altitudes = km during a major geomagnetic storm.
The electron density in the mid-latitude trough decreased and the temperatures increased during the early phases Author: W. Burke, R. Sagalyn. A critical part of the vertical ionospheric electron concentration profile is the region above its maximum (topside ionosphere) and many attempts have been made to model this region because of the limited experimental data available.
Recently, many topside electron concentration profiles obtained with the Intercosmos satellite became. Ionosphere Topside Sounder program - electron density and geomagnetic field at Alouette I orbit. A model is presented for the thickness of the electron density profile in the region above the F layer maximum.
The model varies with time and solar conditions; it is specified by observations or predictions of the height of the F layer maximum; and it is independent of latitude.
Results indicate that a mean thickness parameter can be estimated to within about 15 percent Author: Richard S. Allen, Jean M. Connelly, Robert Vesprini. the IRI model. A large number of electron density profi\Cs in the topside ionosphere have been obtained from the Alouette and ISIS satellites, and the shape of electron density profile is derived from Alouette topside ionosonde measurements.
The positive ion composition is a very important parameter for the ionosphere but the data are rather Author: V. Pandey, K. Mahajan. Modeling the Lower Part of the Topside Ionospheric Vertical Electron Density Proﬁle Over the European Region by Means of Swarm Satellites Data and IRI UP Method A.
Pignalberi 1, M. Pezzopane2, and R. Rizzi 1Dipartimento di Fisica e Astronomia, Alma Mater Studiorum-Università di Bologna, Bologna, Italy, 2Istituto Nazionale di. Title: Operational System for Local Ionospheric Electron Density Profile Reconstruction (LIEDR) Royal Meteorological Institute (RMI) DOCUMENT CHANGE RECORD VERSION DATE CHANGE RECORD AUTHOR First Version S.
Stankov SUMMARY An operational system is being developed for calculating and displaying the vertical electron. concentration changes by a factor of an exponent (eE). Since the plasma temperature varies with altitude, it is obvious that the plasma scale height varies as well (Fig.
1B). Also, the value of the plasma scale height indicates the gradient of the electron density; for instance, in the topside ionosphere region—the region situated Cited by: 1 High-Latitude Topside Ionospheric Vertical Electron-Density-Profile Changes in Response to Large Magnetic Storms Robert F.
Benson 1, Joseph Fainberg, Vladimir A. Osherovich2, Vladimir Truhlik3, Yongli Wang4, Dieter Bilitza5, and Shing F. Fung1 1NASA/Goddard Space Flight Center, Geospace Physics Laboratory, CodeHeliophysics Science Division, Greenbelt. The spatial distribution of electron number densities in the ionosphere, especially the height profile Ne(h),is essential for ionospheric related studies and practical applications.
As a measure of the shape of the electron density profile, the scale height is one of the important ionospheric characteristics. However, the knowledge of the spatial behavior of ionospheric scale heights.
Electron densities and scale heights in the topside ionosphere - Alouette I observations recorded at Hawaii, wintersummer by Chan, K.-L.; Colin, L. The pdf is on the yr interval from to when both solar-wind and Alouette/ISIS topside-sounder data are potentially available.
Several case studies were investigated and some showed significant Ne enhancements in the high-latitude topside ionosphere. One of these cases is shown in detail in Figure 1.Mathematical procedures and digital computer programs for converting observed topside curves into electron density profiles.High-Latitude Topside Ionospheric Vertical Electron-Density-Profile changes in response to Large Magnetic Storms Robert F.
Ebook, Joseph Fainberg1, Vladimir A. Osherovich2, Vladimir Truhlik3, Yongli Wang4, Dieter Bilitza5, and Shing F. Fung1 1NASA/Goddard Space Flight Center, Geospace Physics Laboratory, CodeHeliophysics Science Division, Greenbelt.