[Ips-dhfpr] IPS Daily HF Prop Report - 07 June 10
rwc at ips.gov.au
Tue Jun 8 09:15:39 EST 2010
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 07/2330Z JUNE 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (07 JUNE)
Date T index Conditions
07 Jun 14 Normal
Niue Island Region:
Depressed by 25% during local day,
Near predicted monthly values during local night.
Depressed by 20% after local dawn.
Northern Australian Region:
Near predicted monthly values during local day,
Depressed by 15% during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Depressed by 15% over the UT day.
PCA Event : No event.
Predicted Monthly T index for June: 26
2. FORECAST (08 JUNE - 10 JUNE)
Date T index Conditions MUFs
08 Jun 5 Normal 5 to 20% below predicted monthly
09 Jun 14 Normal near predicted monthly values/depressed
0 to 10%
10 Jun 14 Normal Near predicted monthly values
COMMENT: IMF Bz north-south was mildly inducive for merging with
the geomagnetic field, causing Unsettled geomagnetic conditions,
depressing frequencies at near equatorial and polar latitudes,
and not counterbalanced by EUV ionisation as the sunspot groups
decline. Solar wind speed is expected to rise on the 8th due
to a recurrent coronal hole, causing Unsettled geomagnetic conditions,
which should slightly depress HF frequencies. This hole is thin
in solar longitude however, so effects should only last for a
day or two. Spread F is prevalent at several stations, particularly
at night, possibly due to Unsettled geomagnetic activity and
so likely to continue for a day or two.
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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