[Ips-dhfpr] IPS Daily HF Prop Report - 11 September 14 issued 2348 UT on 11 Sep 2014

rwc rwc at ips.gov.au
Fri Sep 12 09:48:35 EST 2014


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 SEPTEMBER 2014 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (11 SEPTEMBER) 
Date   T index  Conditions    
11 Sep   101    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.1    1526UT  possible   lower  South American/
                                    Atlantic
  M1.4    2126UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% 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):
      Near predicted monthly values over the UT day.
      Proton event in progress, increased absorption observed.

PCA Event : 10MeV Proton/PCA Event Began 11 09 2014 1215UT and is in progress

Monthly T index:
Month  T index
Aug      72
Sep      88
Oct      84


2. FORECAST (12 SEPTEMBER - 14 SEPTEMBER)
Date   T index  Conditions       MUFs                              
12 Sep    75    Fair             Near predicted monthly values
13 Sep    40    Poor             20 to 30% below predicted monthly 
                                 values    
14 Sep    40    Fair             20 to 30% below predicted monthly 
                                 values   

COMMENT: IPS SWF HF Communications Warning 47 was issued on 11 
September and is current for 11-12 Sep. Variable HF conditions 
observed for Equatorial regions during local night with otherwise 
good ionospheric support for all other regions except Antarctica 
where a polar cap absorption event currently in progress due 
to recent CME activity. MUF depressions of ~20% for Southern 
AUS and Northern AUS regions possible over the next 24 hours 
due to increased geomagnetic activity. Reduced ionospheric support 
expected for all regions on 13Sep-14Sep due to geomagnetic storm 
conditions.

----------------------------------------------------------
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
PO Box 1386                         WWW: http://www.ips.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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