[Ips-dhfpr] IPS Daily HF Prop Report - 16 January 07

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 16/2330Z JANUARY 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 JANUARY) 
Date   T index  Conditions    
16 Jan    30    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Enhanced by 30% during local night.
   Northern Australian Region:
      Enhanced by 15% 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.

PCA Event : No event.

Predicted Monthly T index for January:  10
2. FORECAST (17 JANUARY - 19 JANUARY)
Date   T index  Conditions       MUFs                              
17 Jan    20    Normal-fair      Unexpected low latitude enhancements 
                                 have outweighed slight mid-latitude 
                                 depressions due to geomagnetic 
                                 activity, with the nett result 
                                 of raising the Autralian region 
                                 T index rather than reducing 
                                 it. Continued enhanced geomagnetic 
                                 activity should decrease regional 
                                 T index over the next day or 
                                 two, although perhaps only to 
                                 near monthly average. 
18 Jan    10    Normal           Near predicted monthly values     
19 Jan    10    Normal           Near predicted monthly values    
COMMENT: The mid-latitude ionosphere is slightly reduced although 
the expected large reductions in MUFs due to ongoing geomagnetic 
activity haven't occurred yet. Equatorial (PNG - VNO, POM) and 
sub-equatorial latitudes (DWN, TVL) show strong enhanments although 
spread-F is also prevalent. Both effects presumed to be the result 
of geomagnetic activity. Strong sporadic E has again occurred 
in the local night and morning, particularly in the south east 
across the Tasman Sea and south towards the Southern Ocean. Some 
of the Es is blanketing the F layer and long distance HF users 
may find circuits still operating on the usual frequencies but 
with reduced amplitude due to greater number of hops. 
----------------------------------------------------------
For an explanation of some of the terms in this report, goto
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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tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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