[Ips-dhfpr] IPS Daily HF Prop Report - 16 January 07
rwc at ips.gov.au
Wed Jan 17 10:40:46 EST 2007
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 16/2330Z JANUARY 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (16 JANUARY)
Date T index Conditions
16 Jan 30 Normal
Equatorial PNG/Niue Region:
Near predicted monthly values during local day,
Enhanced by 30% during local night.
Northern Australian Region:
Enhanced by 15% during local day,
Near predicted monthly values 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 January: 10
2. FORECAST (17 JANUARY - 19 JANUARY)
Date T index Conditions MUFs
17 Jan 20 Normal-fair Unexpected low latitude enhancements
have outweighed slight mid-latitude
depressions due to geomagnetic
activity, with the nett result
of raising the Autralian region
T index rather than reducing
it. Continued enhanced geomagnetic
activity should decrease regional
T index over the next day or
two, although perhaps only to
near monthly average.
18 Jan 10 Normal Near predicted monthly values
19 Jan 10 Normal Near predicted monthly values
COMMENT: The mid-latitude ionosphere is slightly reduced although
the expected large reductions in MUFs due to ongoing geomagnetic
activity haven't occurred yet. Equatorial (PNG - VNO, POM) and
sub-equatorial latitudes (DWN, TVL) show strong enhanments although
spread-F is also prevalent. Both effects presumed to be the result
of geomagnetic activity. Strong sporadic E has again occurred
in the local night and morning, particularly in the south east
across the Tasman Sea and south towards the Southern Ocean. Some
of the Es is blanketing the F layer and long distance HF users
may find circuits still operating on the usual frequencies but
with reduced amplitude due to greater number of hops.
For an explanation of some of the terms in this report, goto
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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