[Ips-dhfpr] IPS Daily HF Prop Report - 17 January 08
rwc
rwc at ips.gov.au
Fri Jan 18 10:44:59 EST 2008
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 17/2330Z JANUARY 2008 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (17 JANUARY)
Date T index Conditions
17 Jan -5 Normal-fair
Flares: none.
MUFs:
Equatorial PNG/Niue Region:
Mostly near predicted monthly values,
Depressed by 20% after local dawn.
Northern Australian Region:
Near predicted monthly values during local day,
Depressed by 30% during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values during local day,
Depressed by 25% 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: 12
2. FORECAST (18 JANUARY - 20 JANUARY)
Date T index Conditions MUFs
18 Jan -5 Normal Below monthly values by (day/night);
5/10% for northern Australia;
5/10% for southern Australia;
5/10% for equatorial; 0/5% for
Antarctica.
19 Jan 0 Normal Below monthly values by (day/night);
5/10% for northern Australia;
5/5% for southern Australia;
5/10% for equatorial; 0/0% for
Antarctica.
20 Jan 0 Normal Near predicted monthly values
COMMENT: At equatorial and sub-equatorial latitudes, extensive
spread F was again observed, probably due to coronal hole induced
geomagnetic disturbance which is now waning. At mid-latitudes
strong pre-dawn sporadic (Es) which blanketed the F layer widespread.
Night Es was common but often was not blanketing. Antarctic ionosphere
was still moderately disturbed due to ongoing but reduced enhanced
geomagnetic conditions (Unsettled to Active) and polar twin-cell
convection caused by geomagnetic-IMF merging.
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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.
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