Author : Charles M. Rush
Publisher :
Page : 72 pages
File Size : 43,43 MB
Release : 1972
Category : Electron distribution
ISBN :
The results of a study undertaken to determine the feasibility of employing synoptic mapping to improve ionospheric forecasting capabilities are presented. Using electron density data obtained from 16 ionosonde stations located in North America and Greenland during the time period mid-April through July 1970, the temporal and spatial variability of the ionosphere was assessed. (Author).
Author : Charles M. Rush
Publisher :
Page : 0 pages
File Size : 48,57 MB
Release : 1972
Category : Electron distribution
ISBN :
The results of a study undertaken to determine the feasibility of employing synoptic mapping to improve ionospheric forecasting capabilities are presented. Using electron density data obtained from 16 ionosonde stations located in North America and Greenland during the time period mid-April through July 1970, the temporal and spatial variability of the ionosphere was assessed. (Author)
Author : Bruno Zolesi
Publisher : Springer Science & Business Media
Page : 244 pages
File Size : 32,74 MB
Release : 2013-09-25
Category : Science
ISBN : 3642384307
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.
Author : B. S. Dandekar
Publisher :
Page : 28 pages
File Size : 24,47 MB
Release : 1976
Category : F region
ISBN :
Using the method of Rush and Gibbs (1973), weighted means of observed values have been used to update the global prediction of f(o)F2, which are based on monthly median values derived from the Institute of Telecommunications Sciences model (1969). This procedure improved the predictions for magnetically quiet periods, for times near minimum of the solar cycle phase, and for the equinoctial months. Furthermore, a closer grid of ionosonde stations resulted in reducing the error in the f(o)F2 prediction. For the method of Rush and Gibbs (1973) to be operationally successful in global predictions of f(o)F2 however, a closer grid of ionosondes than is presently available is needed. (Author).
Author : B. S. Dandekar
Publisher :
Page : 27 pages
File Size : 33,16 MB
Release : 1982
Category : Ionosphere
ISBN :
The purpose of this report is to familiarize a user of ionospheric models with the options presently available for ionospheric prediction and specification. Two types of ionospheric models are available: the numerical-phenomenological and theoretical models. From the numerical type, the ITS-78, IONCAP, and Bent models have been discussed. In the theoretical models the main concern is the number of parameters included in the model. Nine ionospheric models available have been summarized. The differences and limitations of these models are compared and tabulated. This information will help a user make a judicious selection of an ionospheric model to satisfy his specific needs. The sources for obtaining the programs for these models have been listed for ready references.
Author : N. A. Elmunim
Publisher : Springer Nature
Page : 108 pages
File Size : 15,59 MB
Release : 2021-09-10
Category : Science
ISBN : 9811650454
This book highlights ionospheric delay investigation and forecasting using GPS-TEC measurements in the equatorial region. The ionospheric delay error is the main source of error and a major concern for GPS applications as it corrupts the positioning and time transfer results. In the equatorial region, the variations of the total electron content (TEC) and the ionospheric delay are recognized to be high when compared with other regions such as mid-latitude and high latitude. The investigation and forecasting of trans-ionospheric propagation errors are essential for precise measurement and further contribute valuable information to satellite and space probe navigation, space geodesy, radio astronomy and other applications.
Author :
Publisher :
Page : 958 pages
File Size : 35,93 MB
Release : 1972
Category : Aeronautics
ISBN :
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.
Author : D. Bilitza
Publisher :
Page : 200 pages
File Size : 42,32 MB
Release : 2004
Category : Ionosphere
ISBN :
Author : David C. Miller
Publisher :
Page : 99 pages
File Size : 34,33 MB
Release : 1977
Category :
ISBN :
This report describes several investigations performed towards improving our ability to communicate through the ionospheric medium. These studies covered two distinct and separate areas. The first was concerned with improvements in ionospheric forecasting in the polar region through the development of empirical models for electron density profiles and ionospheric parameters. The second consisted of the study of various techniques for the establishment of high frequency communication circuit parameters. Attempts have been made to accurately determine ray paths for ionospheres with simple gradients without the use of three dimensional ray tracing techniques. (Author).
Author : Jules Aarons
Publisher :
Page : 252 pages
File Size : 36,2 MB
Release : 1984
Category : Ionosphere
ISBN :
