[Ips-dhfpr] IPS Daily HF Prop Report - 18 March 09
rwc at ips.gov.au
Thu Mar 19 10:38:48 EST 2009
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 18/2330Z MARCH 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (18 MARCH)
Date T index Conditions
18 Mar -4 Normal-fair
Equatorial PNG/Niue Region:
Near predicted monthly values during local day,
Depressed by 15% during local night.
Northern Australian Region:
Depressed by 20% 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 March: 3
2. FORECAST (19 MARCH - 21 MARCH)
Date T index Conditions MUFs
19 Mar 0 Normal-fair Near predicted monthly values
20 Mar 0 Normal-fair Near predicted monthly values
21 Mar -4 Normal 0 to 5% below predicted monthly
COMMENT: Expect near or slightly below monthly predicted HF frequencies
early in the UT day. The effect of a small coronal hole should
commence late today, 19th March UT, or early tomorrow, with slightly
increased geomagnetic activity. See geomagnetic and solar sections.
This will likely raise ionisation and HF frequencies to near
monthly predicted levels for a day or two. Extensive spread F
and sporadic Es was observed, particularly at equatorial latitudes.
Darwin- pre-dawn Es and spread-F. Vanimo - pre-dawn spread-F.
Nuie - dusk and pre-dawn strong spread-F and daytime blanketing
Es. Cocos Is - dusk spread-F. Hobart - night spread-F and dusk
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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