[Ips-dhfpr] IPS Daily HF Prop Report - 24 July 13 issued 2330 UT on 24 Jul 2013
Regional Warning Centre
rwc at ips.gov.au
Thu Jul 25 09:30:37 EST 2013
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/24 JULY 2013 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (24 JULY)
Date T index Conditions
24 Jul 64 Normal
Flares: none.
MUFs:
Cocos Island Region:
Enhanced by 15% during local day.
Depressed by 35% during local night.
Niue Island Region:
Near predicted monthly values during local day.
Depressed by 20% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 20% 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 July: 69
2. FORECAST (25 JULY - 27 JULY)
Date T index Conditions MUFs
25 Jul 65 Normal Near predicted monthly values/depressed
0 to 10%
26 Jul 55 Fair 0 to 20% below predicted monthly
values
27 Jul 55 Normal-fair 0 to 20% below predicted monthly
values
COMMENT: MUFs were near predicted monthly values for 24 hour
averages across the region during daylight hours over the last
24 hours with the daily T index slightly below predicted monthly
average. However there was significant hourly variability with
night-time MUFs depressed across northern regions 20-35%. Significant
wave activity was observed causing hourly variability. Strong
Spread-F evident in the West. Expect mostly normal average HF
conditions for most of 25-Jul, with MUFs perhaps slightly below
average. There should be Unsettled-Active geomagnetic activity
due to high solar wind speed from a recurrent coronal hole CH576,
with possible peak Minor Storm (depending on Interplanetary Magnetic
field north-south orientation) from late on 25-Jul for ~2 days,
probably causing MUF depressions up to 20% and larger hourly
MUF variations.
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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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PO Box 1386 WWW: http://www.ips.gov.au
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