[Ips-dhfpr] IPS Daily HF Prop Report - 11 April 01
rwc
rwc at ips.gov.au
Thu Apr 12 09:31:00 EST 2001
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 11/2330Z APRIL 2001 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (11 APRIL)
Date T index Conditions
11 Apr 120 Fair
Flares Max Fadeout Freq. Sectors
M2/1F 1326UT possible lower European
MUFs:
Equatorial PNG Region:
Enhanced by 15% during local day,
Near predicted monthly values during local night.
Depressed by 15% after local dawn.
Northern Australian Region:
Mostly near predicted monthly values,
Depressed by 40% after local dawn.
Southern Australian and New Zealand Region:
Mostly near predicted monthly values,
Depressed by 55% after local dawn.
Antarctic Region (Casey/Scott Base):
Depressed by 40% over the UT day.
Predicted Monthly T index for April: 120
2. FORECAST (12 APRIL - 14 APRIL)
Date T index Conditions MUFs
12 Apr 5 Poor Depressed 50-60% for high latitudes.
Depressed 20-30% low to middle
latitudes.
13 Apr 50 Fair 10 to 30% below predicted monthly
values
14 Apr 90 Normal-Fair about 15% below predicted monthly
values
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.
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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