[Ips-dhfpr] IPS Daily HF Prop Report - 14 September 04
rwc at ips.gov.au
Wed Sep 15 09:55:05 EST 2004
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 14/2330Z SEPTEMBER 2004 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (14 SEPTEMBER)
Date T index Conditions
14 Sep 68 Normal
Flares Max Fadeout Freq. Sectors
M1.5/1F 0930UT possible lower Mid East/Indian
Equatorial PNG Region:
Enhanced by 15% during local day,
Enhanced by 55% during local night.
Northern Australian Region:
Enhanced by 25% during local day,
Enhanced by 45% during local night.
Southern Australian and New Zealand Region:
Enhanced by 35% during local day,
Enhanced by 20% during local night.
Antarctic Region (Casey/Scott Base):
Proton event in progress, increased absorption observed.
PCA Event : 10Mev Proton/PCA Event Began 13 09 2004 2115UT and is in progress
Predicted Monthly T index for September: 38
2. FORECAST (15 SEPTEMBER - 17 SEPTEMBER)
Date T index Conditions MUFs
15 Sep 55 Normal about 15% above predicted monthly
16 Sep 50 Fair about 10% above predicted monthly
17 Sep 50 Normal about 10% above predicted monthly
COMMENT: IPS HF Communications Warning 38 was issued on 13 September
and is current for interval 14-15 September. Overnight enhancements
observed again in Equatorial/N Aus region. Generally good HF
conditions observed at low to mid latitudes despite considerable
geomagnetic disturbance following the solar wind shock arrival
late on Sep 13. A proton-PCA event is in progress resulting in
poor HF conditions in the Antarctic region. Expect continuing
poor propagation conditions in Antarctic region, with the possibility
of a further minor shock arrival on day two. Propagation at low
to mid latitudes shows no sign of degradation at this stage.
For an explanation of some of the terms in this report, goto
http://www.ips.gov.au, and follow links to Educational->
Gloassary on Solar Terrestrial Terms.
IPS Radio and Space Services | email: asfc at ips.gov.au
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