In a message dated 25/07/2009, gmvoeth@........... writes:

> I  like your Georgia Design But would absolutely need two such sensors 
for a  complete whole.

*** You mentioned measuring tilt that way earlier; but  I don't think its 
that necessary.



Hi Geoff,
 
    You CAN'T cancel out tilt variations in vertical  sensors by just using 
two identical instruments!
    You can do it using a seismometer AND a pure  tiltmeter.
 
    Regards,
 
    Chris Chapman






In a message dated 25/07/2009, gmvoeth@........... writes:
> I 
  like your Georgia Design But would absolutely need two such sensors=
 for a 
  complete whole.

*** You mentioned measuring tilt that way earlier=
; but 
  I don't think its that necessary.


Hi Geoff,
 
    You CAN'T cancel out tilt variations in verti=
cal 
sensors by just using two identical instruments!
    You can do it using a seismometer AND a pure=
 
tiltmeter.
 
    Regards,
 
    Chris Chapman