NTIA/ITS 13 April 2004 1 ITS HF Propagation Software Greg Hand US Department of Commerce NTIA/ITS .
-
Upload
pearl-baker -
Category
Documents
-
view
228 -
download
0
Transcript of NTIA/ITS 13 April 2004 1 ITS HF Propagation Software Greg Hand US Department of Commerce NTIA/ITS .
NTIA/ITS 13 April 2004 1
ITS HF Propagation Software
Greg Hand
US Department of Commerce
NTIA/ITS
http://elbert.its.bldrdoc.gov
NTIA/ITS 13 April 2004 2
Outline
Models – ICEPAC, VOACAP, REC533 History Users/Applications Examples Free
NTIA/ITS 13 April 2004 3
Disclaimer
The software contained within was developed by an agency of the U.S.
Government. NTIA/ITS has no objection to the use of this software for
any purpose since it is not subject to copyright protection in the U.S.
NTIA/ITS 13 April 2004 4
HF Propagation Models
ICEPAC - Ionospheric Communications Enhanced Profile Analysis & Circuit prediction program
VOACAP - Voice Of America Coverage Analysis
Program
REC533 - Recommendation ITU-R P.533-6
NTIA/ITS 13 April 2004 5
ICEPAC
IONCAP – IONospheric Communications Analysis and Prediction program (1983)
ICED - Ionospheric Conductivity and Electron Density profile model -Tascione (1987) sub-auroral trough auroral zone polar cap
Use Kp to model solar storms
NTIA/ITS 13 April 2004 6
VOACAP
1985 - VOA adopts IONCAP as model to be used for broadcast station design
NRL - modifies IONCAP into VOACAP 1993 - VOACAP released 1993 - NTIA/ITS add DOS GUI interface 1996 - Windows 3.x 16-bit version 1997 - Windows-NT 32-bit version Present - 04.0324W - Windows-XP/2000/NT/95/98
NTIA/ITS 13 April 2004 7
REC533
Recommendation ITU-R P.533-6 First released - July 1993 International HF Coordination
NTIA/ITS 13 April 2004 8
Users of the Software
HF Broadcasters (VOA, BBC, ITU, HFCC) Military Defense contractors Airline communications HAMs HF Email – Sailmail / Airmail BPL
NTIA/ITS 13 April 2004 9
Other useful links: Join the VOACAP Mailing List. User's Guide - Signal-to-Noise Predictions Using VOACAP
by George Lane ($65) VOACAP Quick Guide - by Jari Perkiomaki (Finland). Space Environment Center for real-time monitoring/forecasting of
solar & geophysical events. Ionosphere Home Page from the National Geophysical Data Center. Ionospheric indices information. ITU HF web page contains Rec 705 antenna and other ITU related info. The HFCC ( High Frequency Co-ordination Conference ) informally
coordinates short wave broadcasting. IBB - International Broadcasting Bureau (VOA, RFE,...) ARRL - National Association for Amateur Radio – QST. NEC Antenna programs (4nec2 by Arie interfaces to ITS HF).
NTIA/ITS 13 April 2004 10
NTIA/ITS 13 April 2004 11
Other useful links: Join the VOACAP Mailing List. User's Guide - Signal-to-Noise Predictions Using VOACAP
by George Lane ($65) VOACAP Quick Guide - by Jari Perkiomaki (Finland). Space Environment Center for real-time monitoring/forecasting of
solar & geophysical events. Ionosphere Home Page from the National Geophysical Data Center. Ionospheric indices information. ITU HF web page contains Rec 705 antenna and other ITU related info. The HFCC ( High Frequency Co-ordination Conference ) informally
coordinates short wave broadcasting. IBB - International Broadcasting Bureau (VOA, RFE,...) ARRL - National Association for Amateur Radio – QST. NEC Antenna programs (4nec2 by Arie interfaces to ITS HF).
NTIA/ITS 13 April 2004 12
NTIA/ITS 13 April 2004 13
Other useful links: Join the VOACAP Mailing List. User's Guide - Signal-to-Noise Predictions Using VOACAP
by George Lane ($65) VOACAP Quick Guide - by Jari Perkiomaki (Finland). Space Environment Center for real-time monitoring/forecasting of
solar & geophysical events. Ionosphere Home Page from the National Geophysical Data Center. Ionospheric indices information. ITU HF web page contains Rec 705 antenna and other ITU related info. The HFCC ( High Frequency Co-ordination Conference ) informally
coordinates short wave broadcasting. IBB - International Broadcasting Bureau (VOA, RFE,...) ARRL - National Association for Amateur Radio – QST. NEC Antenna programs (4nec2 by Arie interfaces to ITS HF).
NTIA/ITS 13 April 2004 14
What SunSpot Number indices should be used.
NOAA has changed how they put out the Ionospheric indices that are used in the NTIA/ITS HF Propagation Models. This will try to explain what indices to use.
•The SunSpot Number (SSN) used by these HF prediction programs should be what is called R12 - the Smoothed SunSpot Number. •NGDC used to have it linked in this table. •That was last updated May 15, 1999. •George Lane says to use: ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/SUNSPOT_NUMBERS/sunspot.predict for compatibility with VOACAP. •SEC also maintains SunSpot data with slightly different numbers under Solar Cycle Progression.
•For past values, you must use the Recent Solar Indices table. •The proper column in this table is Smoothed RI
•For predicted values, you must use the Predicted Indices table. •The proper column in this table is SunSpot Number Predicted
•You will notice that the Predicted table is about 6 months behind the current date. That is because it takes that long for the smoothed SunSpot Number to become permanent.
•I questioned someone at SEC as to what was the difference between SEC's and NGDC's sunspot predictions, and here is his response. •Note: We cannot control the content nor accessibility of the NOAA web pages.
NTIA/ITS 13 April 2004 15
Other useful links: Join the VOACAP Mailing List. User's Guide - Signal-to-Noise Predictions Using VOACAP
by George Lane ($65) VOACAP Quick Guide - by Jari Perkiomaki (Finland). Space Environment Center for real-time monitoring/forecasting of
solar & geophysical events. Ionosphere Home Page from the National Geophysical Data Center. Ionospheric indices information. ITU HF web page contains Rec 705 antenna and other ITU related info. The HFCC ( High Frequency Co-ordination Conference ) informally
coordinates short wave broadcasting. IBB - International Broadcasting Bureau (VOA, RFE,...) ARRL - National Association for Amateur Radio – QST. NEC Antenna programs (4nec2 by Arie interfaces to ITS HF).
NTIA/ITS 13 April 2004 16
Point-to-Point Data Input
NTIA/ITS 13 April 2004 17
Ionospheric Coefficients
CCIR/Oslo URSI88/Australian Daily foF2 – interpolated URSI88
NTIA/ITS 13 April 2004 18
ICEPAC - Effective SSN
NTIA/ITS 13 April 2004 19
Point-to-Point Output
NTIA/ITS 13 April 2004 20
Point-to-Point Graph
NTIA/ITS 13 April 2004 21
Point-to-Point by Distance
NTIA/ITS 13 April 2004 22
Point-to-Point by Time
NTIA/ITS 13 April 2004 23
Point-to-Point by Time
NTIA/ITS 13 April 2004 24
Area Coverage Data Input
NTIA/ITS 13 April 2004 25
Area Coverage Map
NTIA/ITS 13 April 2004 26
Combine Multiple Coverages
NTIA/ITS 13 April 2004 27
Overlay Multiple Coverages
NTIA/ITS 13 April 2004 28
Conclusion
Free – http://elbert.its.bldrdoc.gov Current funding Modifications via CRADA Future?