[Ips-dsgr] IPS Daily Report - 26 April 09

[rwc]

SUBJ: IPS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 26/2330Z APRIL 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 26 APRIL AND FORECAST FOR 27 APRIL - 29 APRIL
STATUS INDICATORS SOL:GREEN   MAG:GREEN     ION: GREEN
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1A. SOLAR SUMMARY
Activity 26 Apr:  Very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number for 26 Apr:  69/3


1B. SOLAR FORECAST
             27 Apr             28 Apr             29 Apr
Activity     Very low           Very low           Very low
Fadeouts     None expected      None expected      None expected
10.7cm/SSN    70/5               70/5               70/5
COMMENT: Solar wind speed remains mildly elevated. The visible 
solar disk is spotless. 




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2A. MAGNETIC SUMMARY

Geomagnetic field for Australian Region 26 Apr: Quiet 

Estimated Indices 26 Apr :  A   K           
   Australian Region       3   12111011
      Darwin               2   12110001
      Townsville           6   22221122
      Learmonth            2   12111001
      Camden               -   --------
      Canberra             1   11010000
      Hobart               1   11010000
      Casey(Ant)           6   23221111
    
Observed Regional daily pc3 Indices 26 Apr : 
      Darwin               0   (Quiet)
      Townsville           0   (Quiet)
      Learmonth            0   (Quiet)
      Alice_Springs        0   (Quiet)
      Camden              NA
      Gnangara             0   (Quiet)
      Canberra             0   (Quiet)
      Hobart               0   (Quiet)
Pc3 pulsations are high frequency (10-45 second period) variations 
of the Earths magnetic field. Daily pc3-indices are the daily sum 
of 20 minute pc3-indices for that station and have been shown to be
well correlated with rejection of high resolution aeromagnetic
survey flight-line data. 

NOTE: Indices may have been generated from data obtained in 
cooperation with the following organisations: Geoscience Australia, 
University of Newcastle Space Physics Group, Australian Government 
Antarctic Division and Space Environment Research Center, Japan.


Estimated AFr/Ap Indices 26 Apr : A 
           Fredericksburg         2
           Planetary              5                         

Observed AFr/Ap Indices 25 Apr :  A   K
           Fredericksburg         2
           Planetary              4   1101 1212     


2B. MAGNETIC FORECAST 
Date      Ap    Conditions
27 Apr     3    Quiet 
28 Apr     5    Mostly quiet, some unsettled periods possible. 
29 Apr     5    Mostly quiet, some unsettled periods possible. 
COMMENT: Solar wind speed remains mildly elevated at ~400 km/s. 
Isolated unsettled intervals were observed at high latitudes 
only. Expect generally quiet conditions next three days. Chance 
of unsettled periods days two and three due to an anticipated 
solar sector boundary crossing. 

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3A. GLOBAL HF PROPAGATION SUMMARY
	            Latitude Band
Date        Low            Middle         High 
26 Apr      Normal         Normal         Normal         
PCA Event : No event.

3B. GLOBAL HF PROPAGATION FORECAST
	            Latitude Band
Date        Low            Middle         High 
27 Apr      Normal         Normal         Normal
28 Apr      Normal         Normal         Normal
29 Apr      Normal         Normal         Normal

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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY


Date   T index
26 Apr     5

Observed Australian Regional MUFs
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Variable conditions 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.

Predicted Monthly T index for April:   3

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date   T index  MUFs
27 Apr     5    Near predicted monthly values 
28 Apr     5    Near predicted monthly values 
29 Apr     5    Near predicted monthly values 
COMMENT: Generally normal to enhanced ionospheric conditions 
observed throughout the region. Expect mostly normal conditions 
next three days with weak night-time ionosphere in Antarctic 
region. 
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5. SPACE ENVIRONMENT SUMMARY

GOES satellite data for 25 Apr
       Daily Proton Fluence >1 MeV:   5.9E+05
       Daily Proton Fluence >10 MeV:  2.0E+04
       Daily Electron Fluence >2 MeV: 3.70E+05   (normal fluence)   
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
       X-ray background: A1.0

ACE Satellite Solar Wind Day Averaged Data for 25 Apr
Speed: 412 km/sec  Density:    2.2 p/cc  Temp:    75900 K  Bz:   0 nT

(Courtesy Space Weather Prediction Center, Boulder USA)
ACE data can be incorrect during strong proton events.
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IPS Radio and Space Services        email: asfc at ips.gov.au
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