[time-nuts] solar flares and cesium drift

[tom jones]

I"ve answered my own question about my apparent cesium drift.
  I went to the usno web site cut & pasted there loran measurements into notepad.
   
  The unso is measuring about 4 loran stations but not the fallon station.
  My conclusion; usno is as good as it gets and the steering at loran stations is not
  averaged enough.
  Fallon time equipment is the same as all other usa loran stations
  using the exact same timing equipment, 3X 5071cesiums, and redundant tsc gps steering.
   
  All loran stations that USNO monitored this week did exactly what fallon did as compared 
  with my 5061..
   
  My data from june 4-7 showed loss consistantly so did USNO's data.
  You can even see todays correction in both mine and USNO's data.
   
  Here is USNO's data;
   
   25 MAY 2007
  GPS           -2 24
  5930         450
  7980         800
  8970         910
  9960         580
   26 MAY 2007  1 day change
  GPS           -1 25
  5930         480 -30
  7980         830 -30
  8970         930 -20
  9960         610 -30
   
  missing 5-29
   
   28 MAY 2007  2 day change
  GPS           -3 27
  5930         440 +40
  7980         830 0
  8970         920 +10
  9960         590 +20
   30 MAY 2007  1 day change
  GPS           -4 29
  5930         450 -10
  7980         830 0
  8970         920 0 
  9960         610 -30
   31 MAY 2007  1 day changes 
  GPS           -4 30
  5930         440 +10
  7980         840 -10
  8970         940 -20
  9960         630 -20
   01 JUN 2007  1 day change
  GPS           -4 31 MAY
  5930         470 -30
  7980         860 -20
  8970         930 +10
  9960         600 +30
   02 JUN 2007  1 day change
  GPS           -3 01
  5930         430 +40
  7980         840 +20
  8970         910 +20
  9960         590 +10
   03 JUN 2007  1 day change
  GPS           -2 02
  5930         420 +10
  7980         820 +20
  8970         940 -30
  9960         600 -10
   04 JUN 2007
  GPS           -3 03
  5930         460 -40
  7980         860 -40
  8970         960 -20
  9960         620 -20
   05 JUN 2007
  GPS           -3 04
  5930         470 -10
  7980         890 -30
  8970         980 -20
  9960         650 -30
   06 JUN 2007
  GPS           -4 05
  5930         460 -10
  7980         860 -30
  8970         950 -30
  9960         570 -80
   07 JUN 2007
  GPS           -5 06
  5930         440 -20
  7980         840 -20
  8970         910 -40
  9960         530 -40
   08 JUN 2007
  GPS           -5 07
  5930         480 +40
  7980         900 +60
  8970         960 +50
  9960         600 +70
   
  See my data below!
  Tom
   
   
  I dont know about the cesium, but I can advise that in my opinion there have
not been any major geomagnetic storms in the past few days. In fact nothing
different to what has been happening for most of the last month. If anything
it is relatively quiet. Solar flares do not produce an magnetic effect, they
are purely radiation. What often happens is the emission of an associated
CME and the currently active area #960 was right on the limb of the visible
disc when the flares occured so any CME missed us. I supose it is possible
that the radiation has affected the accuracy of GPS as received after
passing through the ionosphere, but surely this would have been corrected
very quickly?

Cheers de Alan G3NYK


  Hi Alan
   
  What I was looking at was the xray events this past week from sunspot #960 There has been about 40 medium size xray events and I assumed that geomagnetic events went hand in hand with xray events and thought it was an explanation for my cesium/loran drift.
   
   
   I was wondering what specific dates you had this observation? I'd like to
compare that data, against some of the data I have.

Raimond Melkers

Hey Raimond here is my data please sent yours if possible.
   
  From 17:26pdt on  6-04-07
  To     07:20pdt on  6-05-07 I lost 40 to 50ns  and continuing 
  To     21:38pdt on  6-05-07 I lost another 10ns to 20ns and continuing
  To     05:23pdt on  6-06-07 I lost another 100ns to 110ns (strong winds ) continuing
  To     06:13pdt on  6-07-07 I lost another 50ns  and continuing 
  To     17:45pdt on  6-08-07 I gained         90ns  could today gain be a gps correction?
   
    Happy Time keeping:
   Tom
   
   
   
  My orignal posting:
   
  We've had several solar flares this past week.  My cesium standard has lost about 200ns as compared with fallon loran and gps.
  I was showing approximately 10 to 30 nanoseconds cesium drift  the previous weeks when 
  solar activity was quiet.
  I'm assuming all the drift I'm observing is my cesium standard (5061) and not loran or gps 
  especially because loran is steered by gps and gps is steered by usno-amc.
   
  Has anyone else noticed any extra cesium drift this week?
  I'm assuming this drift is due to changes in the earth geomagnetic field due to solar activity? 

   

       
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