[Ips-dhfpr] IPS Daily HF Prop Report - 18 June 14 issued 2330 UT on 18 Jun 2014

[Regional Warning Centre]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 JUNE 2014 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 JUNE) 
Date   T index  Conditions    
18 Jun    78    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values to 15% depressed.
      Depressed 35-45% 13-18, 22-23 UT. Spread F 15-21
      UT.
   Niue Island Region:
      Near predicted monthly values to 15% depressed.
      Depressed 15-25% 01-02, 08-09, 13-14, 21-22 UT.
   Northern Australian Region:
      Near predicted monthly values to 15% depressed.
      Depressed 20-40% at Darwin 13-16, 21 UT. Night
      spread F observed at both stations.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values. Depressed
      20-25% at Hobart 19-23 UT. Spread F observed at
      Hobart during night hours.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 30% depressed.
      Sporadic E 07-18 UT at Macquarie Island.

PCA Event : No event.

Monthly T index:
Month  T index
May      80
Jun      92
Jul      91


2. FORECAST (19 JUNE - 21 JUNE)
Date   T index  Conditions       MUFs                              
19 Jun    70    Normal           Near predicted monthly values 
                                 to 20% depressed
20 Jun    70    Normal           Near predicted monthly values 
                                 to 20% depressed    
21 Jun    70    Normal           Near predicted monthly values 
                                 to 20% depressed   

COMMENT: IPS HF Communications Warning 30 was issued on 17 June 
and is current for 17-19 Jun. Lower than expected solar flux 
is likely to reduce MUFs below those based on the monthly T index, 
particularly on circuits including the southern hemisphere. Night 
communications may be degraded due to spreading and tilting in 
the ionosphere.

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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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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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