[Ips-dhfpr] IPS Daily HF Prop Report - 10 April 01
rwc
rwc at ips.gov.au
Wed Apr 11 09:30:57 EST 2001
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 10/2330Z APRIL 2001 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (10 APRIL)
Date T index Conditions
10 Apr 131 Normal
Flares Max Fadeout Freq. Sectors
X2/3B 0526UT probable all E. Asia/Aust.
MUFs:
Equatorial PNG Region:
Mostly near predicted monthly values,
Northern Australian Region:
Mostly near predicted monthly values,
Enhanced by 15% after local dawn.
Southern Australian and New Zealand Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base):
Enhanced by 20% over the UT day.
Predicted Monthly T index for April: 120
2. FORECAST (11 APRIL - 13 APRIL)
Date T index Conditions MUFs
11 Apr 100 Poor depressed 10 to 20%/near predicted
monthly values
12 Apr 85 Fair 10 to 20% below predicted monthly
values
13 Apr 110 Normal near predicted monthly values/depressed
10 to 20%
COMMENT: IPS HF Communications Warning 23 was issued on 10 April
and is current for interval 11-13 April. Shortwave fadeouts expected
on daylight HF circuits. Enhanced proton fluxes associated with
both M7.9 and X2.3 flares from region 9415 on 9 Apr and 10 Apr
are affecting high-latitude HF comms. Depressions are expected
over the 11 to 13 Apr period after the anticipated arrival on
11 Apr of two shocks associated with the M7.9 and X2.3 flares/CMEs
observed after 1534UT on 9 Apr and 0517UT on 10 Apr, respectively.
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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