Variability and asymmetry in inclinometry

• Through at least 1997 - 1998 : see plot .
• Manifestation as asymmetry and 'spikes' in inclinometry.
• a summary of the Assumptions, Observations, Inferences, Theories and Questions (by RJSG et al)
• a working theory (by RSJG)
• Weights added to antenna during May 1999 (by RSJG)
• Subsequent inclinometry (see the reports of 1999 ) and the symmetry plot show the solution in effect.
• Apparent, temporary (?) re-appearance of the inclinometry 'spikes'
  • 25 Feb 2002 First sign - CBLA inconclusive
  • 24 Apr 2002 'Spikes' are larger
  • 14 May 2002 CBLA
  • - closed, Apr 2003
• Spikes return in 2009 - central bearing is adjusted