[Ips-whfpr] IPS Weekly Prop. Report (23 July 08)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 23/0200Z JULY 2008 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (16 JULY - 22 JULY)
Date   T index   Conditions        
16 Jul   -2      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Depressed by 15% during local day,
      Mostly near predicted monthly values during local
      night. 
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day with periods
      of minor to significant degradations.

17 Jul    4      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values. Depressions to 30% at
      Vanimo 03-07 and 11-15 UT. Some night spread F
      observed at Niue.
   Northern Australian Region:
      Near predicted monthly values. Some night spread F
      observed.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Depressions to 30% at
      Hobart 08-09 UT.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values.

18 Jul    2      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day with
      some periods of minor depressions. 
   Northern Australian Region:
      Depressed by 15% during local day,
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values during local day.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Periods of some MUF enhancements and depressions 
      with minor to moderate degradations. 

19 Jul   -4      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values with periods of 
      minor to moderate degradations during the local day
      times. 
   Northern Australian Region:
      Mostly near predicted monthly values,
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Periods of enhancements and minor to significant
      degradations in conditions. 

20 Jul   -4      Normal-fair       
MUFS:
   Equatorial PNG/Niue Region:
      Mostly near predicted monthly values. Depressions to
      45% at Vanimo 05-09 UT; no data after 09 UT.Depressions
      to 25% at Niue 01-05 UT. Some night spread F and night
      sporadic E observed at Niue.
   Northern Australian Region:
      Near predicted monthly values with depressions to 25%,
      00, 03-07 UT at Darwin and 01-03 UT at Townsville.
      Night spread F observed.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Enhancements to 50%
      observed at Christchurch 08-17 UT. Night spread F
      observed at most stations.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 30% depressed.

21 Jul    5      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 30% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 50% over the UT day.

22 Jul    0      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 50% over the UT day.

Predicted Monthly T index for July:   4
2. FORECAST (23 JULY - 29 JULY) 
MUFS: Possible MUF depressions of 10-20% for 23Jul-25Jul
with otherwise near predicted monthly values for the 
remainder of the week.

Propagation conditions: Mostly normal. No SWFs expected.

T index:    0

3. OUTLOOK (30 JULY - 29 AUGUST)
Degraded HF propagation conditions possible:
08-Aug to 11-Aug.

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
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