[Ips-dhfpr] IPS Daily HF Prop Report - 06 April 01
rwc
rwc at ips.gov.au
Sat Apr 7 09:17:58 EST 2001
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 06/2330Z APRIL 2001 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (06 APRIL)
Date T index Conditions
06 Apr 153 Normal
Flares Max Fadeout Freq. Sectors
X5.7 1921UT probable all East Pacific/
North American
MUFs:
Equatorial PNG Region:
Mostly near predicted monthly values,
Northern Australian Region:
Near predicted monthly values during local day,
Enhanced by 15% during local night.
Southern Australian and New Zealand Region:
Mostly near predicted monthly values,
Antarctic Region (Casey/Scott Base):
Enhanced by 25% over the UT day.
Predicted Monthly T index for April: 120
2. FORECAST (07 APRIL - 09 APRIL)
Date T index Conditions MUFs
07 Apr 150 Normal about 10% above predicted monthly
values
08 Apr 100 Fair 10 to 20% below predicted monthly
values
09 Apr 90 Fair-Poor 10 to 20% below predicted monthly
values
COMMENT: IPS HF Communications Warning 20 was issued on 6 April
and is current for interval 8-10 April. Shortwave fadeouts expected
on daylight HF circuits. Polar region HF comms still affected
by PCA with proton fluxes still lingering around the event threshold.
Depressed conditions for 8 and 9 April are expected following
the arrival of two shocks associated with M5 and X5 flares and
CMEs observed on the 5 and 6 April from region 9415.
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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