MajBach Posted April 21, 2002 Share Posted April 21, 2002 There apppears to be a few threads related to GPS malfunctions and solar activity. Here is some pertinent info taken from this site: 1. SUBJ: IPS AURORA ALERT ISSUED AT 0320 UT on 20 Apr 2002 BY IPS RADIO AND SPACE SERVICES FROM THE AUSTRALIAN SPACE FORECAST CENTRE GEOMAGNETIC STORM IN PROGRESS. AURORA MAY BE OBSERVED DURING LOCAL NIGHT TIME HOURS IN GOOD OBSERVING CONDITIONS AT HIGH LATITUDES. Follow the progress of this event on the IPS Space Weather Status Panel, ]http://www.ips.gov.au/asfc/status_panel/ 2. A PERSISTANT GEOMAGNETIC STORM: A coronal mass ejection swept past Earth on Friday morning (April 19) and triggered a moderate geomagnetic storm. Instead of waning with the passage of time, however, the storm has intensified. Sky watchers in Canada and across the northern tier of US states report seeing auroras on Friday evening (April 19). Northern skies will continue to glow through Saturday morning (April 20) if geomagnetic activity persists at current levels. High-latitude sky watchers should remain alert for naked-eye auroras, while mid-latitude observers might be able to record fainter auroras on film. Sky watchers in southern Australia and New Zealand might also spot Southern Lights. Visit spaceweather.com for details and updates. 3. Australia - Ionosphering and Space prediction - current 20 April 2002 http://www.ips.gov.au/asfc/current/ IPS Real-Time Space Weather Status Panel http://www.ips.gov.au/ Australian Radio & Space Services (influence of the SUN Radio... on HF transmissions) http://www.ips.gov.au/whatsnew.html http://www.ips.gov.au/promo/sms/sms-info.html IPS alerts as Special Message Service (SMS) text on your mobile phone IPS Propagation Warning SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 02/15 ISSUED AT 19/0022Z APRIL 2002 BY THE AUSTRALIAN SPACE FORECAST CENTRE. DEGRADED HF PROPAGATION CONDITIONS EXPECTED FROM 19-20 APRIL 2002 IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND ------------------------------------------------------------- SOLAR ACTIVITY FORECAST HF COMMS FADEOUTS 19 Apr: moderate Possible 20 Apr: low to moderate Possible HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION) FREQUENCY BANDS T-index MUFs 2 4 6 8 12 16 22 26 ------------------------------------------------------------- 19 Apr 120 -10%/normal 2 4 6 8 12 16 16 22 20 Apr 140 normal 2 4 6 8 12 16 22 26 Sam It seems the solar flare was not as bad in Australia but it is affecting long HF transmissions. I am talking of HF transmissions from 1000 to 5000 kms Most of this stuff is hyroglyphics (sp?) to mee too. Suffice is to say, this type of phenomenon is not ideal to the GPS. Related links: http://www.sec.noaa.gov/forecast.htmlhttp://edu-observatory.org/eo/aurora.html http://www.spacew.com/www/aurora.html MajBach You can't have everything,where would you put it? Quote Link to comment
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