[Ips-wsgr] IPS Weekly Solar and Geophysical Report (29 June 07)

[rwc]

SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 29 JUNE 2007, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (22 JUNE - 28 JUNE)
Date     22    23    24    25    26    27    28
10cm     65    66    67    68    71    73    75
AFr      12     8     4     3     4     5 (  4)
Aaus     12     6     6     2     4     4 (  5)
T        12     5     6     4    -2     4     7

Solar:        Solar flare activity.
Geomagnetic:  Geomagnetic activity observed for Australian region.
Frequencies:  Australian ionospheric F2 critical frequencies.

22 Jun 
Solar:        Very low
Geomagnetic:  Quiet to active 
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   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):
      Mostly near predicted monthly values.
      Degraded conditions observed at times due to
      sporadic E and/or spread F conditions.

23 Jun 
Solar:        Very low
Geomagnetic:  Quiet to unsettled 
Frequencies:  
   Equatorial PNG/Niue 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):
      Mostly near predicted monthly values.
      Degraded conditions observed at times due to
      sporadic E and/or spread F conditions and/or
      a weak winter solar mininum ionosphere.

24 Jun 
Solar:        Very low
Geomagnetic:  Quiet 
Frequencies:  
   Equatorial PNG/Niue Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Depressed by 10% during local day.
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Mostly near predicted monthly values to 15% depressed
      at times.

25 Jun 
Solar:        Very low
Geomagnetic:  Quiet 
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values with occasional
      depressions to 30%.
   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 to 20% depressed.

26 Jun 
Solar:        Very low
Geomagnetic:  Quiet 
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted values to 20% depressed. Night time
      spread F observed. At Vanimo, MUFS were depressed
      20-50% 00-13 UT with sporadic E obscuring the F region
      from 14-20 UT.
   Northern Australian Region:
      Near predicted values to 20% depressed. Night time
      spread F observed.
   Southern Australian and New Zealand Region:
      Near predicted values to 15% depressed with night
      time spread F.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with spread F and night
      time sporadic E.

27 Jun 
Solar:        Low
Geomagnetic:  Quiet 
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values. Sporadic E observed at
      Port Moresby 09-13 UT. Depressions to 30% observed at
      Vanimo 00-09 UT.
   Northern Australian Region:
      Near predicted monthly values with depressions to 20%
      observed at Darwin and Learmonth 00-06 UT. Night
      spread F observed.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with night spread F.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with spread F day and
      night.

28 Jun 
Solar:        Very low
Geomagnetic:  Quiet to unsettled 
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values. Night spread F observed.
   Northern Australian Region:
      Near predicted monthly values. Darwin near predicted
      values to 20% depressed 00-07 UT. Night spread F observed.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Night spread F observed.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values. Daytime spread F and
      night sporadic E observed at Casey.

 
2. FORECAST (29 JUNE - 05 JULY)
Solar: 
Very low to low, although chance of an M class flare.

Geomagnetic:  
Quiet to unsettled conditions. Possible isolated active levels
on 29 June.

Frequencies:  
Mostly near predicted monthly values, although depressions to 25%
possible at times. Spread F likely at night and may degrade
communications then.

For an explanation of some of the terms in this report, go to
http://www.ips.gov.au/1/2/1.

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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