Improvement of Real Time F0F2 Prediction for OTH Radars
Author : B. S. Dandekar
Publisher :
Page : 238 pages
File Size : 28,75 MB
Release : 1995
Category : Ionospheric forecasting
ISBN :
Author : B. S. Dandekar
Publisher :
Page : 238 pages
File Size : 28,75 MB
Release : 1995
Category : Ionospheric forecasting
ISBN :
Author :
Publisher :
Page : 78 pages
File Size : 33,52 MB
Release :
Category : Environmental geology
ISBN :
Author : B. S. Dandekar
Publisher :
Page : 68 pages
File Size : 49,12 MB
Release : 1986
Category : Ionospheric forecasting
ISBN :
During the 2- to 3-hr sunrise transition period, the relative change in foF2 is 20-60 percent per hour and is independent of solar activity. The change is largest in winter and smallest in summer. To prevent the skip distance from changing by more than 250 km, that is, to maintain continuous illumination of at least 50 percent of the barrier (nominal width 500 km), requires that the operating frequency be changed for every 6 percent change in foF2. Thus, in the case of an OTH system, the operating frequency has to be adjusted during the sunrise period every 6 to 20 min (seasonal dependence) for satisfactory performance. To accommodate such rapid changes, an empirical algorithm has been tested for improved foF2 predictions during sunrise. The prediction scheme is based on the availability of relevant (under the oblique raypath) real time ionospheric data.
Author :
Publisher :
Page : 788 pages
File Size : 21,12 MB
Release : 1981
Category : Aeronautics
ISBN :
Author : B. S. Dandekar
Publisher :
Page : 70 pages
File Size : 46,13 MB
Release : 1994
Category : Ionosphere
ISBN :
Author :
Publisher :
Page : 716 pages
File Size : 40,90 MB
Release : 1996
Category : Science
ISBN :
Author : B. S. Dandekar
Publisher :
Page : 110 pages
File Size : 25,59 MB
Release : 1996
Category : Ionospheric radio wave propagation
ISBN :
Author : David Lyttleton Cooke
Publisher :
Page : 104 pages
File Size : 29,6 MB
Release : 1994
Category : Space plasmas
ISBN :
Author :
Publisher :
Page : 506 pages
File Size : 33,58 MB
Release : 1996
Category : Astrophysics
ISBN :
Author : Bruno Zolesi
Publisher : Springer Science & Business Media
Page : 244 pages
File Size : 13,28 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.