[Ips-dhfpr] SWS Daily HF Prop Report - 12 December 16 issued 2334 UT on 12 Dec 2016 [SEC=UNCLASSIFIED]

rwc rwc at ips.gov.au
Tue Dec 13 10:34:21 EST 2016


SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 DECEMBER 2016 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 DECEMBER) 
Date   T index  Conditions    
12 Dec    -7    Poor-fair      

Flares: B class flares

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

PCA Event : No event.

Monthly T index:
Month  T index
Nov      3
Dec      24
Jan      23


2. FORECAST (13 DECEMBER - 15 DECEMBER)
Date   T index  Conditions       MUFs                              
13 Dec    -5    Fair             5 to 30% below predicted monthly 
                                 values
14 Dec     0    Fair             0 to 25% below predicted monthly 
                                 values    
15 Dec     5    Fair             0 to 20% below predicted monthly 
                                 values   

COMMENT: SWS HF Communications Warning 66 was issued on 12 December 
and is current for 12-14 Dec. Conditions for HF radio wave propagation 
were depressed in the Southern Hemisphere during 12 Dec UT. They 
were more depressed at high latitudes than low latitudes. For 
example, the local T index was -50 at Hobart and 9 at Darwin. 
Conditions are expected to trend towards predicted monthly values 
during the next 3 days. HF users are advised to use frequencies 
lower than the predicted monthly values. Mid-latitude sporadic 
E layers are prevalent on an almost daily basis.

----------------------------------------------------------
For an explanation of some of the terms in this report, go to
http://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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