[Ips-dhfpr] IPS Daily HF Prop Report - 15 October 09
rwc
rwc at ips.gov.au
Fri Oct 16 10:26:37 EST 2009
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 15/2330Z OCTOBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (15 OCTOBER)
Date T index Conditions
15 Oct -8 Normal
Flares: none.
MUFs:
Cocos Island/Niue Island Region:
Depressed by 15% during local day,
Depressed by 20% during local night.
Northern Australian Region:
Near predicted monthly values 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 (16 OCTOBER - 18 OCTOBER)
Date T index Conditions MUFs
16 Oct -2 Normal near predicted monthly values/depressed
5 to 20%
17 Oct -2 Normal near predicted monthly values/depressed
5 to 20%
18 Oct -3 Normal near predicted monthly values/depressed
5 to 10%
COMMENT: HF frequencies are expected to remain mostly at normal
to reduced levels during daytime across Aus/NZ for the next 3
days with greater reductions in the north. Near-Equatorial regions
show higher variability than mid-latitudes. Lack of significant
magnetic activity indicates much of the low and mid latitude
variability from monthly medians is being driven by neutral winds.
Slightly enhanced geomagnetic activity in the day from increased
Vsw may lift ionisation and frequencies. Similarly in 4-5 days
when a coronal hole will probably take effect.effect. Extensive
strong Es was observed across the region at Nuie 04-05UT, Learmonth
12-13UT, Darwin 1230-14UT, Townsville 03-05UT, Brisbane 14-18UT,
Norfolk Is 10-12UT, Hobart 17-21UT.
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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.
IPS Radio and Space Services email: asfc at ips.gov.au
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