[Ips-whfpr] IPS Weekly Prop. Report (11 February 09)
rwc
rwc at ips.gov.au
Wed Feb 11 12:39:15 EST 2009
SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 11/0200Z FEBRUARY 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (04 FEBRUARY - 10 FEBRUARY)
Date T index Conditions
04 Feb 5 Normal-fair
MUFS:
Equatorial PNG/Niue Region:
Near predicted to enhanced at Niue. Near predicted to
20% depressed at Vanimo with sporadic E 01-13 UT.
Northern Australian Region:
Mostly near predicted monthly values. Depressions to
30% observed at times at Darwin and Cocos Is. 06-13 UT.
Southern Australian and New Zealand Region:
Lower latitude stations experienced near predicted to
enhanced MUFs. MUFs at higher latitudes were near
predicted with depressions to 30%, mostly 11-20 UT.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted to 25% depressed.
05 Feb -8 Normal-fair
MUFS:
Equatorial PNG/Niue Region:
Niue MUFs were near predicted to 30% depressed. Vanimo
MUFs were near predicted with enhancements 11-19 UT.
Some night spread F observed.
Northern Australian Region:
Darwin MUFs were mostly near predicted to enhanced
with 35% depressions 07-08 UT. Cocos Is. MUFs were
depressed 20-50% and Townsville MUFs were near
predicted with depressions to 35% 00-08 UT. Night
spread F observed.
Southern Australian and New Zealand Region:
Near predicted monthly values to 30% depressed. Night
spread F observed. Sporadic E observed at stations
between 00-20 UT, obscuring the F region at times.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted to 25% depressed.
06 Feb -4 Fair-normal
MUFS:
Equatorial PNG/Niue Region:
Near predicted monthly values with periods of
depressions.
Northern Australian Region:
Near predicted monthly values during local day with
periods of depressions,
Enhanced by 45% during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
07 Feb -13 Fair-normal
MUFS:
Equatorial PNG/Niue Region:
Depressed by 40% during local day,
Depressed by 15% during local night.
Northern Australian Region:
Depressed by 30% during local day,
Depressed by 15% during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
08 Feb -12 Normal-fair
MUFS:
Equatorial PNG/Niue Region:
Near predicted monthly values to 45% depressed.
Some night spread F observed at Niue.
Northern Australian Region:
Near predicted monthly values to 45% depressed.
Sporadic E observed at Cocos Is. 06-10 and 19-21 UT
and Townsville 14-21 UT.
Southern Australian and New Zealand Region:
Brisbane and Learmonth and Norfolk Is. MUFs were near
predicted monthly values to 30% depressed; sporadic E
observed at Brisbane and Norfolk Is. 15-21 UT. Higher
latitude station MUFs were mostly near predicted monthly
values with sporadic E observed 11-19 UT.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Mostly near predicted monthly values. Depressions to
30% at Macquarie Is. 12-17 UT.
09 Feb -11 Normal-fair
MUFS:
Equatorial PNG/Niue Region:
Depressed by 30% during local day,
Depressed by 25% during local night.
Northern Australian Region:
Depressed by 30% during local day,
Depressed by 20% during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values during local day,
Depressed by 15% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
10 Feb -0 Fair-normal
MUFS:
Equatorial PNG/Niue Region:
Near predicted monthly values during local day,
Depressed by 15% during local night.
Northern Australian Region:
Depressed by 20% during local day,
Near predicted monthly values during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
Predicted Monthly T index for February: 6
2. FORECAST (11 FEBRUARY - 17 FEBRUARY)
MUFS: Depressions of 10%-20% expected for low to mid
latitudes. High latitude MUFs near predicted monthly
values but with possible depressed conditions from
15Feb.
Propagation conditions: Mostly Normal with isolated
disturbed periods. No SWFs.
T index: 6
COMMENT: IPS HF Communications Warning 3 was issued on
8 February and is current for interval 9-11 February.
3. OUTLOOK (18 FEBRUARY - 20 MARCH)
Degraded HF propagation conditions possible:
No signficant degraded periods expected.
PLEASE NOTE:
Space weather conditions can frequently be determined by short
timescale events that cannot be forecast a week in advance,
particularly at solar maximum.
For an explanation of some of the terms in this report, go to
http://www.ips.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.
IPS Radio and Space Services email: asfc at ips.gov.au
PO Box 1386 WWW: http://www.ips.gov.au
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp.ips.gov.au
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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