[Ips-dhfpr] IPS Daily HF Prop Report - 26 January 09
rwc at ips.gov.au
Tue Jan 27 10:44:39 EST 2009
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 26/2330Z JANUARY 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (26 JANUARY)
Date T index Conditions
26 Jan -2 Normal-fair
Equatorial PNG/Niue Region:
Depressed by 20% during local day,
Near predicted monthly values during local night.
Northern Australian Region:
Near predicted monthly values.
Southern Australian and New Zealand Region:
Near predicted monthly values during local day,
Depressed by 15% 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 January: 6
2. FORECAST (27 JANUARY - 29 JANUARY)
Date T index Conditions MUFs
27 Jan -5 Normal near predicted monthly values/depressed
10 to 20%
28 Jan -5 Normal near predicted monthly values/depressed
10 to 20%
29 Jan -10 Normal Near predicted monthly values
COMMENT: Intermittent sporadic-E events again observed throughout
the region, often strong blanketing Es that obscured the F-region.
MUFs were mildly depressed in all latitudes, particularly during
the local day. At mid-latitudes a mild post-dusk enhancement
was observed at most stations. There were more significant local
depressions and enhancements during in the equatorial region,
despite the lack of strong geomagnetic activity. These are likely
caused by high altitude (300km) thermospheric winds. The IMF/solar
wind and resultant moderate geomagnetic activity appears to have
raised F2 region ionisation slightly above the previous days.
Continuing Sporadic-E events seem likely from Equatorial to S.Aus/NZ
regions. Expect MUFs to continue below monthly averages due to
lack of sunspot activity although the mild geomagnetic activity
from the CIR/coronal hole may slightly alleviate this for a day
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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