[Ips-dhfpr] IPS Daily HF Prop Report - 19 May 10
rwc
rwc at ips.gov.au
Thu May 20 09:45:48 EST 2010
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 19/2330Z MAY 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (19 MAY)
Date T index Conditions
19 May 6 Normal
Flares: none.
MUFs:
Cocos Island Region:
Depressed by 15% during local day,
Near predicted monthly values during local night.
Niue Island Region:
Near predicted monthly values during local day,
Depressed by 25% during local night.
Depressed by 20% after local dawn.
Northern Australian Region:
Depressed by 15% during local day,
Near predicted monthly values during local night.
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 May: 24
2. FORECAST (20 MAY - 22 MAY)
Date T index Conditions MUFs
20 May 5 Normal depressed 10 to 20%/near predicted
monthly values
21 May 5 Normal depressed 10 to 20%/near predicted
monthly values
22 May 15 Normal Near predicted monthly values
COMMENT: Mild MUF depressions were observed in the Australian
region due to the lower EUV levels emitted from the sun, resulting
from the lack of sunspots on the visible solar disc. Expect this
trend to continue until sunspot numbers return to predicted levels.
The Unsettled Geomagnetic activity over the next two days is
not expected to have a significant effect on the HF conditions
in the Australian Region. Note, sunspot region 1069 is due to
rotate onto the visible solar disc on 22 May.
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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
PO Box 1386 WWW: http://www.ips.gov.au
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp.ips.gov.au
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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