[Ips-dhfpr] IPS Daily HF Prop Report - 24 September 01
rwc at ips.gov.au
Tue Sep 25 10:17:39 EST 2001
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 24/2330Z SEPTEMBER 2001 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (24 SEPTEMBER)
Date T index Conditions
24 Sep 130 Fair-normal
Flares Max Fadeout Freq. Sectors
X2/2B 1038UT probable all European
Equatorial PNG Region:
Near predicted monthly values during local day,
otherwise enhanced greater than 20%.
Northern Australian Region:
Enhanced greater than 15%.
Southern Australian and New Zealand Region:
Depressed 15-30% during local day otherwise
mostly near predicted monthly values.
Antarctic Region (Casey/Scott Base):
Depressed 15-30% to near predicted monthly values.
Predicted Monthly T index for September: 108
2. FORECAST (25 SEPTEMBER - 27 SEPTEMBER)
Date T index Conditions MUFs
25 Sep 140 Normal Near predicted monthly values
to enhanced 15%.
26 Sep 70 Poor 20 to 40% below predicted monthly
27 Sep 100 Fair-Poor depressed 10 to 20%/near predicted
COMMENT: Mildly degraded HF conditions were observed during the
local day for Southern Australian and New Zealand regions following
mildly elevated geomagnetic activity on 23 September. Significantly
degraded HF conditions have been observed at high lats since
approximately 16UT on 24 September due to a PCA event and are
expected to continue to be degraded for the next few days. Mid-low
latitudes should be mostly near normal for 25 Sept but then are
expected to be significantly degraded for 26-27 September following
the impact of a large CME due early on 26 September. Fadeouts
can be expected on daylight HF circuits.
IPS Radio and Space Services | email: asfc at ips.gov.au
PO Box 1386 | WWW: http://www.ips.gov.au/asfc
Haymarket NSW 1240 AUSTRALIA | FTP: ftp://ftp.ips.gov.au/users/asfc/
tel: +61 2 9213 8010 | fax: +61 2 9213 8060
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