Validation Of The Ionospheric Forecast Model Ifm

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Validation of the Ionospheric Forecast Model (IFM)

Michael D. Scott
Validation of the Ionospheric Forecast Model IFM Book PDF

Author : Michael D. Scott
Publisher : Unknown
Page : 109 pages
File Size : 52,9 Mb
Release : 2000-03
Category : Electronic
ISBN : 1423533739

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Validation of the Ionospheric Forecast Model (IFM) by Michael D. Scott Pdf

The purpose of this research was to validate the Ionospheric Forecast Model (IFM) Version 3 to assess its suitability and usefulness as an operational tool. The Ionospheric forecast model is a first principles computer model designed to forecast the state of the global ionosphere to 24 hours. The scope was limited to a comparison of the F2 layer critical frequency (foF2) and peak electron density (hmF2) against observed ionosonde data. The model was run with global solar and geomagnetic indices and Information from Digitial Ionospheric Sounding System (DISS) observations as inputs. The DISS observations were input through the Parameterized Real-Time Ionospheric Specification Model (PRISM). The IFM was run for a total of 25 days. It was run twice for each 24-hour period: once by starting with only an initial specification of the ionosphere from an empirical model, and again, with an initial specification from the PRISM model with DISS data as an input. As many as 50 DISS stations were used as inputs to the PRISM model, and FM output was compared against the observations from 10 of the 50 stations. Analysis of the foF2 showed that the IFM output was, on average, was within 1 MHz of observed values, and showed a slight bias to over forecast. Correlation between predictions and observations was generally about 0.8. Analysis of the hmF2 data showed a tendency for the model to under forecast the values. hmF2 forecasts were characterized by large errors and poor correlation between predicted and observed values. There was surprisingly little difference between the results with DISS input and without. The model does not seem to heavily weight the observed data input through PRISM.

Aeronomy of the Earth's Atmosphere and Ionosphere

Mangalathayil Ali Abdu,Archana Bhattacharyya,Dora Pancheva
Aeronomy of the Earth s Atmosphere and Ionosphere Book PDF

Author : Mangalathayil Ali Abdu,Archana Bhattacharyya,Dora Pancheva
Publisher : Springer Science & Business Media
Page : 479 pages
File Size : 46,6 Mb
Release : 2011-02-26
Category : Science
ISBN : 9789400703261

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Aeronomy of the Earth's Atmosphere and Ionosphere by Mangalathayil Ali Abdu,Archana Bhattacharyya,Dora Pancheva Pdf

This book is a multi-author treatise on the most outstanding research problems in the field of the aeronomy of the Earth’s atmosphere and ionosphere, encompassing the science covered by Division II of the International Association of Geomagnetism and Aeronomy (IAGA). It contains several review articles and detailed papers by leading scientists in the field. The book is organized in five parts: 1) Mesosphere-Lower Thermosphere Dynamics and Chemistry; 2) Vertical Coupling by Upward Propagating Waves; 3) Ionospheric Electrodynamics and Structuring; 4) Thermosphere- Ionosphere Coupling, Dynamics and Trends and 5) Ionosphere-Thermosphere Disturbances and Modeling. The book consolidates the progress achieved in the field in recent years and it serves as a useful reference for graduate students as well as experienced researchers.

Ionospheric Prediction and Forecasting

Bruno Zolesi,Ljiljana R. Cander
Ionospheric Prediction and Forecasting Book PDF

Author : Bruno Zolesi,Ljiljana R. Cander
Publisher : Springer Science & Business Media
Page : 244 pages
File Size : 53,6 Mb
Release : 2013-09-25
Category : Science
ISBN : 9783642384301

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Ionospheric Prediction and Forecasting by Bruno Zolesi,Ljiljana R. Cander Pdf

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.

Radio Science

Anonim
Radio Science Book PDF

Author : Anonim
Publisher : Unknown
Page : 226 pages
File Size : 52,9 Mb
Release : 2008
Category : Radio meteorology
ISBN : UIUC:30112106705517

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Radio Science by Anonim Pdf

The Solar Dynamics Observatory

Phillip Chamberlin,William Dean Pesnell,Barbara Thompson
The Solar Dynamics Observatory Book PDF

Author : Phillip Chamberlin,William Dean Pesnell,Barbara Thompson
Publisher : Springer Science & Business Media
Page : 405 pages
File Size : 43,9 Mb
Release : 2012-05-05
Category : Science
ISBN : 9781461436737

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The Solar Dynamics Observatory by Phillip Chamberlin,William Dean Pesnell,Barbara Thompson Pdf

This volume is dedicated to the Solar Dynamics Observatory (SDO), which was launched 11 February 2010. The articles focus on the spacecraft and its instruments: the Atmospheric Imaging Assembly (AIA), the Extreme Ultraviolet Variability Experiment (EVE), and the Helioseismic and Magnetic Imager (HMI). Articles within also describe calibration results and data processing pipelines that are critical to understanding the data and products, concluding with a description of the successful Education and Public Outreach activities. This book is geared towards anyone interested in using the unprecedented data from SDO, whether for fundamental heliophysics research, space weather modeling and forecasting, or educational purposes. Previously published in Solar Physics journal, Vol. 275/1-2, 2012. Selected articles in this book are published open access under a CC BY-NC 2.5 license at link.springer.com. For further details, please see the license information in the chapters.

Midlatitude Ionospheric Dynamics and Disturbances

Paul M. Kintner, Jr.,Anthea J. Coster,Tim Fuller-Rowell,Antony J. Mannucci,Michael Mendillo,Roderick Heelis
Midlatitude Ionospheric Dynamics and Disturbances Book PDF

Author : Paul M. Kintner, Jr.,Anthea J. Coster,Tim Fuller-Rowell,Antony J. Mannucci,Michael Mendillo,Roderick Heelis
Publisher : John Wiley & Sons
Page : 762 pages
File Size : 45,6 Mb
Release : 2013-05-03
Category : Science
ISBN : 9781118671719

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Midlatitude Ionospheric Dynamics and Disturbances by Paul M. Kintner, Jr.,Anthea J. Coster,Tim Fuller-Rowell,Antony J. Mannucci,Michael Mendillo,Roderick Heelis Pdf

Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 181. Filling the need for a 20-year lag in substantial consideration of the midlatitude ionosphere, this volume focuses on work that takes advantage of GPS and UV imaging from satellites over the past decade, two methods that have profoundly transformed our understanding of this stratum of the atmosphere. Its interdisciplinary content brings together researchers of the solar wind, magnetosphere, ionosphere, thermosphere, polar and equatorial ionospheres, and space weather. Modeling and assimilative imaging of the ionosphere and thermosphere show for the first time the complex and global impact of midlatitude ionospheric storms. The editors invited the leading experts in the following areas to contribute the chapters herein: Characterization of Midlatitude Storms Electric Field Coupling From the Heliosphere and Inner Magnetosphere Thermospheric Control of the Midlatitude Ionosphere Ionospheric Irregularities Experimental Methods and New Techniques These themes were chosen to create a path for understanding the midlatitude ionosphere. They continue to be largely valid and represent a coherent division of the subject matter. They will be critical for understanding space weather during the upcoming solar maximum. This book was inspired by the Chapman Conference of the same name held January 2007.

Wide Area DGPS Design Issues Study

Tysen Mueller
Wide Area DGPS Design Issues Study Book PDF

Author : Tysen Mueller
Publisher : Unknown
Page : 140 pages
File Size : 54,8 Mb
Release : 1995
Category : Aids to navigation
ISBN : NWU:35556023537756

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Wide Area DGPS Design Issues Study by Tysen Mueller Pdf

Ionospheric Delay Investigation and Forecasting

N. A. Elmunim,M. Abdullah
Ionospheric Delay Investigation and Forecasting Book PDF

Author : N. A. Elmunim,M. Abdullah
Publisher : Springer Nature
Page : 108 pages
File Size : 40,6 Mb
Release : 2021-09-10
Category : Science
ISBN : 9789811650451

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Ionospheric Delay Investigation and Forecasting by N. A. Elmunim,M. Abdullah Pdf

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.

A Validation of the Parameterized Real-Time Ionospheric Specification Model (PRISM)

Shawn D. Filby
A Validation of the Parameterized Real Time Ionospheric Specification Model PRISM Book PDF

Author : Shawn D. Filby
Publisher : Unknown
Page : 129 pages
File Size : 44,8 Mb
Release : 1997-11-01
Category : Electronic
ISBN : 1423567900

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A Validation of the Parameterized Real-Time Ionospheric Specification Model (PRISM) by Shawn D. Filby Pdf

The most current version of the Parameterized Real-time Ionospheric Specification Model (PRISM), version 1.7b, was validated using Digital Ionospheric Sounding System (DISS) measurements of F2 layer critical frequency (foF2) and F2 peak electron density height (hmF2) as the "ground truth." PRISM was executed, first, with no real-time input parameter and, second, with Global Positioning System (GPS) Total Electron Content (TEC) measurements as the sole real-time parameter. Hourly values of hmF2 and foF2 over 123 days in 1994-1996 (solar minimum conditions) and covering three seasons (equinox, summer solstice, and winter solstice) were compared for Wallops Island, Virginia, and Point Arguello, California, which both have a GPS receiver and a nearby DISS station. Values of hmF2 and foF2 from the DISS data, the PRISM output with no real-time input parameters, and the PRISM output with the GPS TEC measurements are compared as a function of season and local time. Results indicate PRISM overestimates foF2 by 20-30% when ingesting GPS TEC. On a subsequent execution of PRISM, the GPS TEC measurements were decreased by four TEC units as an estimation of the topside light ion (He, H) and plasmaspheric electrons which are not considered in the physical models of PRISM. PRISM underestimates foF2 by 30-40% and underestimates hmF2 by as much as 40 km in the post-midnight timeframe when driven by the corrected TEC values.

Validation and Characterization of Ionospheric Densities Measured by DMSP

Herbert L. Keyser
Validation and Characterization of Ionospheric Densities Measured by DMSP Book PDF

Author : Herbert L. Keyser
Publisher : Unknown
Page : 136 pages
File Size : 40,6 Mb
Release : 2001-03-01
Category : Ionosphere
ISBN : 1423528212

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Validation and Characterization of Ionospheric Densities Measured by DMSP by Herbert L. Keyser Pdf

Future models of the thermosphere-ionosphere-magnetosphere system will require near real-time assimilation of ionospheric parameters to specify% and forecast these regions One of the current sensors that will be used in the GAIM model is the DMSP SSIES. Knowledge of the SSIES's reliability and data characteristics is key to using the data when relying on automated processes to ingest the data. To validate the DMSP value, the DMSP-measured density is compared to ground-based ISR measurements from solar minimum to solar maximum. The DMSP data are compared to data from the ISRs located at the Millstone Hill Observatory in Massachusetts and Sondrestrom in Greenland. The DMSP was found to measure densities 10 percent - 20 percent lower than Millstone Hill and 90 percent lower then Sondrestrom, however both were within the uncertainties of the ISR measurements. The DMSP data over Millstone Hill were analyzed for variability. After de trending the data, the variability was found to range from 0.2 percent in geomagnetically quiescent periods to over 20 percent during active periods.

International Aerospace Abstracts

Anonim
International Aerospace Abstracts Book PDF

Author : Anonim
Publisher : Unknown
Page : 962 pages
File Size : 40,6 Mb
Release : 1995
Category : Aeronautics
ISBN : STANFORD:36105016772555

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International Aerospace Abstracts by Anonim Pdf

The Prediction of Ionospheric Conditions

G.S. Ivanov-Kholodny,A.V. Mikhailov
The Prediction of Ionospheric Conditions Book PDF

Author : G.S. Ivanov-Kholodny,A.V. Mikhailov
Publisher : Springer
Page : 168 pages
File Size : 45,5 Mb
Release : 2013-11-13
Category : Science
ISBN : 9401089213

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The Prediction of Ionospheric Conditions by G.S. Ivanov-Kholodny,A.V. Mikhailov Pdf

The ionosphere of the Earth has been actively studied since the 1920's, following the discovery of ground radio-sounding. By means of this method results were ohtained by an international network of ionospheric stations, in particular, by the successful implementation of a number of rigorously planned international scientific research programs,'" enabling the collection of extensive experimental material on some of the most important parameters of the ionosphere - the critical freLjuencies of E-, Fl and F2-layers. Comprehensive analyses of these observation data give a fairly complete picture of the various changes taking place in the principal ionospheric layers at different points on our globe. Another important aspect of the study of the ionosphere, which has been in progress for the past three decades, is an extensive program of in situ determinations of the various physical parameters - first using rockets, and subsequently artificial satellites. The data thus obtained on the principal ionizing agent - short-wave solar radiation - and on the physical conditions prevailing in the upper atmosphere and in the ionosphere at different altitudes, allow the proposal of a self-consistent mechanism of ionosphere formation. A general outline of the theory of ionosphere formation at different altitudes is now complete. Its application to specific cases, dependent on a more accurate determination of input parameters to give solutions valid for a definite set of conditions etc., is yet to be accomplished. The use of artificial satellites in cosmic research yielded abundant scientific data.