[Ips-dhfpr] IPS Daily HF Prop Report - 14 October 09
rwc
rwc at ips.gov.au
Thu Oct 15 10:14:33 EST 2009
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 14/2330Z OCTOBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (14 OCTOBER)
Date T index Conditions
14 Oct -4 Normal
Flares: none.
MUFs:
Cocos Island/Niue Island Region:
Depressed by 20% during local day,
Depressed by 35% during local night.
Northern Australian Region:
Depressed by 20% during local day,
Enhanced by 15% during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
PCA Event : No event.
Predicted Monthly T index for October: 1
2. FORECAST (15 OCTOBER - 17 OCTOBER)
Date T index Conditions MUFs
15 Oct -2 Normal near predicted monthly values/depressed
5 to 10%
16 Oct -2 Normal near predicted monthly values/depressed
5 to 10%
17 Oct -2 Normal near predicted monthly values/depressed
5 to 10%
COMMENT: HF frequencies are expected to remain mostly at normal
to slightly reduced levels during daytime across Aus/NZ for the
next 3 days with possible nighttime enhancements. Blanketing
Es was observed at Townsville 05-09UT (day) and lesser Es at
Cocos Is 18-20UT (night), Nuie 06-07UT (afternoon), Darwin 11-12UT
(afternoon) and Brisbane 12-14UT (night). Near-Equatorial regions
show higher variability than mid-latitudes due to the equatorial
fountain. Lack of magnetic activity indicates much of the low
and mid latitude variability from monthly medians is being driven
by neutral winds. No significant geomagnetic activity that would
lift ionisation and frequencies expected for 4-5 days when a
coronal hole will probably take effect.effect.
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For an explanation of some of the terms in this report, go to
http://www.ips.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.
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