[Ips-mag-alert] IPS MAGNETIC-PC3 ALERT

[Regional Warning Centre]

SUBJ: IPS GEOMAGNETIC PULSATION ALERT (AUSTRALIAN REGION)
ISSUED AT 08/0421UT Nov 2000 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

GEOMAGNETIC PULSATIONS ARE HIGH FREQUENCY VARIATIONS OF THE EARTH'S
MAGNETIC FIELD WHICH MAY DEGRADE THE QUALITY OF HIGH RESOLUTION 
AEROMAGNETIC SURVEY DATA. PC3 PULSATIONS ARE VARIATIONS IN THE
PERIOD RANGE 10-45 SECONDS WHICH MAY NOT BE ADEQUATELY REMOVED
FROM AEROMAGNETIC SURVEY DATA BY STANDARD PROCESSING TECHNIQUES.
PC3 PULSATION INDICES ARE THE RMS VALUE CALCULATED FROM 20 MINUTE
INTERVALS OF GEOMAGNETIC FIELD DATA FILTERED OVER THE PC3 FREQUENCY
RANGE AND SCALED BY 10 TO PRODUCE INTEGER INDICES.

GEOMAGNETIC PULSATION ACTIVITY OBSERVED
PRELIMINARY PULSATION INDEX HAS REACHED 5
HOBART CURENT PC3 INDEX: 08 11 00 03 UT pc3 Index: 5
HOBART PC3 EVENT LIST FOR UT DAY:
03 50 00    5


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