[Ips-dhfpr] IPS Daily HF Prop Report - 23 September 15 issued 2335 UT on 23 Sep 2015

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 SEPTEMBER 2015 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 SEPTEMBER) 
Date   T index  Conditions    
23 Sep    39    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Depressed by 35% during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Depressed by 25% during local day.
      Near predicted monthly values during local night.
      Depressed by 25% after local dawn.
   Southern Australian Region:
      Depressed by 25% during local day.
      Depressed by 15% during local night.
      Depressed by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      46
Sep      75
Oct      73


2. FORECAST (24 SEPTEMBER - 26 SEPTEMBER)
Date   T index  Conditions       MUFs                              
24 Sep    35    Fair             15 to 20% below predicted monthly 
                                 values
25 Sep    40    Fair             15 to 20% below predicted monthly 
                                 values    
26 Sep    40    Fair             15 to 20% below predicted monthly 
                                 values   

COMMENT: IPS HF Communications Warning 57 was issued on 21 September 
and is current for 22-24 Sep. Moderately degraded HF conditions 
were observed during 23 September over the Australasian region 
due to low levels of ionising radiation. There was some recovery 
local night time hours over the poor ionospheric support for 
HF of the previous week. Solar 10.7cm flux is expected to rise 
slightly over the next few days which should improve ionospheric 
conditions generally. Elevated geomagnetic activity is anticipated 
days two and three of the forecast period which will negatively 
impact HF propagation conditions, mainly in the Antarctic region.

----------------------------------------------------------
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.

Space Weather Services              email: asfc at ips.gov.au
Bureau of Meteorology
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