[Ips-dhfpr] IPS Daily HF Prop Report - 19 December 12 issued 2232 UT on 19 Dec 2012
rwc
rwc at ips.gov.au
Thu Dec 20 09:32:46 EST 2012
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 DECEMBER 2012 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (19 DECEMBER)
Date T index Conditions
19 Dec 69 Normal
Flares: none.
MUFs:
Cocos Island Region:
Near predicted monthly values during local day.
Enhanced by 35% during local night.
Niue Island Region:
Near predicted monthly values.
Northern Australian Region:
Near predicted monthly values.
Southern Australian and New Zealand Region:
Depressed by 15% during local day.
Near predicted monthly values during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
PCA Event : No event.
Predicted Monthly T index for December: 81
2. FORECAST (20 DECEMBER - 22 DECEMBER)
Date T index Conditions MUFs
20 Dec 75 Normal Near predicted monthly values
21 Dec 80 Normal Near predicted monthly values
22 Dec 80 Normal Near predicted monthly values
COMMENT: HF frequencies were near monthly medians over the last
24 hours at mid latitudes except for slight depression during
daytime at southern latitudes, probably due to reduced EUV as
two active regions rotated off the disc. At northern near-equatorial
latitudes there was more variability than mid-latitudes, as usual,
with a large daytime enhancement NW of Australia. Expect MUFs
on 20-Dec to average near predicted monthly values as AR1635
just rotated onto the disc adds in new EUV. Low MUF variability
expected at mid-latitudes as the geomagnetic field returns to
Quiet, as long as no prolonged IMF Bz southward periods occur.
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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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