[Ips-dhfpr] IPS Daily HF Prop Report - 25 June 08
rwc
rwc at ips.gov.au
Thu Jun 26 09:49:42 EST 2008
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 25/2330Z JUNE 2008 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (25 JUNE)
Date T index Conditions
25 Jun 9 Normal
Flares: none.
MUFs:
Equatorial PNG/Niue Region:
Near predicted monthly values.
Northern Australian Region:
Depressed by 15% during local day,
Enhanced by 15% during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values during local day,
Enhanced by 30% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 30% over the UT day.
PCA Event : No event.
Predicted Monthly T index for June: 5
2. FORECAST (26 JUNE - 28 JUNE)
Date T index Conditions MUFs
26 Jun 10 Normal about 5% above predicted monthly
values
27 Jun 10 Normal about 5% above predicted monthly
values
28 Jun 5 Normal Near predicted monthly values
COMMENT: Australasian region ionosphere was mostly normal over
the UT day and slightly enhanced over the expected average, reversing
the trend of the last few days. Daytime MUFs were slightly below
average and nighttime MUFs were enhanced by more to cause an
overall strengthening. This was more prominent at sub-equatorial
latitudes (across Learmonth, Townsville, Niue). * Spread-F was
again prevalent in the north at equatorial and sub-equatorial
latitudes, and also at night at many mid-latitude stations. *
The recurrent solar coronal hole (see geomagnetic section) did
not take geomagnetic effect yet but should do today and tomorrow,
possibly enhancing MUFs Thu/Fri. * MUFs in the Antarctic were
above predicted monthly values. Strong IMF Bz north-south fluctuations
from 22UT, associated with a solar wind speed sudden increase
should cause geomagnetic and ionospheric disturbances in Antarctica
and strong positive IMF By east-west polarity should skew the
twin-cell ionospheric convection pattern away from normal.
----------------------------------------------------------
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
IMPORTANT: This e-mail, including any attachments, may contain,
confidential or copyright information. The views expressed in
this message are those of the individual sender, unless
specifically stated to be the views of IPS. If you are not
the intended recipient, please contact the sender immediately
and delete all copies of this e-mail and attachments.
Occasionally IPS sends email promoting IPS products and
services to its mailing list customers. If you do not wish to
receive this promotional material please email
no-spam at ips.gov.au with the subject header:UNSUBSCRIBE"
More information about the ips-dhfpr
mailing list