[Ips-dhfpr] IPS Daily HF Prop Report - 19 July 07

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 19/2330Z JULY 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 JULY) 
Date   T index  Conditions    
19 Jul     4    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Mostly near predicted monthly values,
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Depressed by 15% during local day,
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values.

PCA Event : No event.

Predicted Monthly T index for July:  10
2. FORECAST (20 JULY - 22 JULY)
Date   T index  Conditions       MUFs                              
20 Jul     8    Normal-Fair      near predicted monthly values 
21 Jul     8    Normal           near predicted monthly values/depressed 
                                 10 to 20%     
22 Jul     4    Normal           near predicted monthly values/depressed 
                                 10 to 20%    

COMMENT: With the exception of the S.Aus/NZ region which showed 
enhanced MUFs overnight, the ionosphere in the Aus region was 
mostly normal to 20% depressed on 19 Jul. Expect mostly normal 
MUFs 20 July, although degraded HF conditions possible due to 
enhanced geomagnetic activity, particularly in the S.Aus/NZ region. 
Some further depressions, up to 20%, are likely 21-22 July. Night 
time spread-F was observed in the S.Aus/NZ region, also expected 
to continue 20 Jul. Sporadic-E was observed at some stations 
in the Aus region during the local day, particularly Darwin and 
Hobart. 

----------------------------------------------------------
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
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 

IMPORTANT: This e-mail, including any attachments, may contain,
confidential or copyright information.  The views expressed in 
this message are those of the individual sender, unless 
specifically stated to be the views of IPS.  If you are not 
the intended recipient, please contact the sender immediately 
and delete all copies of this e-mail and attachments. 
Occasionally IPS sends email promoting IPS products and 
services to its mailing list customers. If you do not wish to 
receive this promotional material please email 
no-spam at ips.gov.au with the subject header:UNSUBSCRIBE"