[SFDXA] W4HM Daily HF-MF Radio Wave Propagation Forecast #2019-89
Bill
bmarx at bellsouth.net
Fri Mar 29 11:30:57 EDT 2019
*#89 issued Friday March 29, 2019 at 1400 UTC*
**
*GLOBAL (HF-MF) (3000-30000 kHz- 300-3000 kHz) RADIO WAVE PROPAGATION
CONDITIONS EXPECTED-***
**
*Radio wave propagation condition “trend” on Mar 29, 2019- steady.*
**
*Radio wave propagation condition “trend” on Mar 30, 2019- steady.*
**
*Radio wave propagation condition “trend” on Mar 31, 2019- steady.*
**
**
**
*NORTHERN HEMISPHERE HF RADIO WAVE PROPAGATION FORECAST *g*-*
**
*3150-3400, 3500-4100, 4750-5050, 5700-6300 kHz- S9 at night and S1-2 at
day,
6900-7800, 9200-9995, 10000-10150, 11500-12200 kHz- S9+ 1 to 9 at night and
S4-7 at day,
13570-13850, 14000-14350, 15005-15900, 17450-17950, 18068-18168 kHz- S0
at night and S3-4 at day,
21000-21850 kHz- S0 at night and S1-2 at day,
24890-24990, 25600-26100 kHz- S0 at night and S1 at day,
*
*28000-29700 kHz- S0 at night and S0 at day.*
**
**
*SOUTHERN HEMISPHERE HF RADIO WAVE PROPAGATION FORECAST *g*-*
**
*3150-3400, 3500-4100, 4750-5050, 5700-6300 kHz- S9 at night and S1-2 at
day,
6900-7800, 9200-9995, 10000-10150, 11500-12200 kHz- S9+ 1 to 9 at night and
S4-7 at day,
13570-13850, 14000-14350, 15005-15900, 17450-17950, 18068-18168 kHz- S0
at night and S3-4 at day,
21000-21850 kHz- S0 at night and S1-2 at day,
24890-24990, 25600-26100 kHz- S0 at night and S1 at day,
*
*28000-29700 kHz- S0 at night and S0 at day.*
**
*GLOBAL (MF) (300-3000 KHZ) RADIO WAVE PROPAGATION CONDITIONS EXPECTED-*
**
*FORECASTED NORTHERN HEMISPHERE SHORT PATH-*
*-East <-> West To 1100 Mi /1800 km *
*S9*
**North <-> South To 1100 Mi /1800 km*
*S5-6*
*+South <-> North To 1100 Mi /1800 km*
*S7-8*
*
**FORECASTED SOUTHERN HEMISPHERE SHORT PATH-*
*-East <-> West To 1100 Mi / 1800 km*
*S9*
**South <-> North To 1100 Mi /1800 km*
*S5-6*
*+North <-> South To 1100 Mi / 1800 km*
*S7-8*
*FORECASTED GREAT CIRCLE LONG OR SKEWED PATH- *
*Northern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans
Pacific and cross Equatorial propagation conditions in**excess of
approximately 3200 mi / 5200 km-*
*High Latitude*
*S3-4*
*Mid Latitude*
*S5-6*
*Low latitude*
*S3-4*
**
*FORECASTED GREAT CIRCLE LONG OR SKEWED PATH- *
*Southern Hemisphere (TA) Trans Atlantic, (TI) Trans Indian, (TP) Trans
Pacific and cross Equatorial propagation conditions in**excess of
approximately 3200 mi / 5200 km-*
*High Latitude*
*S3-4*
*Mid Latitude*
*S5-6*
*Low latitude*
*S3-4*
**
*This HF-MF Radio wave propagation forecast is produced based on the
SIGINT_CAP HF-MF radio wave propagation prediction software. X and O ray
tracing is included.*
*I wrote it beginning in the late 1980’s but I’m sorry to say that it
still can’t be distributed to the general public. It does outperform VOA
CAP and Prop Lab.*
*I do check the actual band conditions at my location in the USA and
tweak the forecast manually where and when necessary.*
**
*I also check global HF-MF radio wave propagation conditions via remoted
radio*
*receivers on every continent of the globe and tweak the forecast
manually if*
*and when necessary.*
**
*And last but not least I look at ionsonde stations on every continent
of the*
*globe.*
**
*The hamateur radio JT65A mode RF signal levels received are based on 5
watts*
*and ½ wave dipole up at 40 feet.*
**
*The hamateur radio PSK31 mode RF signal levels received are based on 25*
*watts and ½ wave dipole up at 40 feet.*
**
*The hamateur radio CW mode RF signal levels received are based on 50 watts*
*and ½ wave dipole up at 40 feet.*
**
*The hamateur radio SSB RF mode signal levels received are based on 100
watts*
*and ½ wave dipole up at 40 feet.*
**
*The HF shortwave broadcast band AM Mode RF signal levels are based on*
*100,000 watts (100 kw) and a typical high gain VOA type curtain array*
*antenna.*
**
*The MF broadcast band AM Mode RF signal levels are based on 50,000
watts (50 kw) and an omnidirectional vertical antenna.*
**
*Please keep in mind that this is a relatively simplified HF-MF radio wave*
*propagation forecast, so as to keep it easily understandable and
applicable*
*by the average radio enthusiast.*
**
*Standard Disclaimer-*
**
*Note! I use error prone RAW public domain data from the NOAA Space*
*Environment Center, other U.S. government entities and educational*
*institutions, to produce this daily HF-MF radio wave propagation*
*forecast. This data is gathered and made public by the U.S. Government
using*
*taxpayer $$$ (including mine).*
**
*However this daily HF-MF propagation forecast that I produce from the RAW*
*public domain data is my personal intellectual property. Therefore this*
*daily HF-MF radio wave propagation forecast contained herein is
copyrighted ©*
*1988-2019 by Thomas F. Giella, W4HM.*
**
*Feel free without prior permission to redistribute this daily HF-MF
radio wave*
*propagation forecast, as long as you redistribute it in its entirety and*
*give me credit for it.*
**
*Also HF-MF radio wave propagation forecasting is still an inexact*
*science and therefore also an art. The forecasts are not official but for*
*educational and hobby related purposes only and are subject to human error*
*and acts of God, therefore no guarantee or warranty implied.*
**
**
More information about the SFDXA
mailing list