Hi Folks,  I just posted three data files, of the 6.2M ANDREANOF =
ISLANDS, ALEUTIAN IS. 080322.212412 as ch1, ch2 and ch3

Channel 1 is what I call a tiltmeter, just a normal pendulum with a 2 =
second period.  It can only swing East and West.  It works well
Channel 2 is a vertical Spring Slinky II, also has a 2 second period.
Channel 3 is my newest on called a Nearly Balanced, a normal pendulum, =
with a 20 second period, It can only swing North and South.

Channel 1 and 2 recorded the event well.
Channel 3 did not record it at all.   I know it is working, as all three =
are recording the road construction, all three show the same large =
backhoe at the same moment in time.
Channel 3 is also sensitive to me moving around the upstairs.

I posted all three and filtered Channel 1 and 2, using Low pass 1, and =
High pass .05..   These filters did nothing on channel 3 so I posted it =
unfiltered.
Perhaps someone can look at all three, to see if I have a problem.   I =
don't think it is over damped, if anything it is under.   Could this be =
the direction the channel is facing?








Hi Folks,  I just posted three =
data files, of=20
the 6.2M ANDREANOF ISLANDS, ALEUTIAN IS. 080322.212412 as ch1, ch2 and=20
ch3
 
Channel 1 is what I call a tiltmeter, =
just a normal=20
pendulum with a 2 second period.  It can only swing East=20
and West.  It works well
Channel 2 is a vertical Spring Slinky =
II, also has=20
a 2 second period.
Channel 3 is my newest on called a =
Nearly Balanced,=20
a normal pendulum, with a 20 second period, It can only swing North and=20
South.
 
Channel 1 and 2 recorded the event=20
well.
Channel 3 did not record it at =
all.   I=20
know it is working, as all three are recording the road construction, =
all three=20
show the same large backhoe at the same moment in time.
Channel 3 is also sensitive to me =
moving around the=20
upstairs.
 
I posted all three and filtered Channel =
1 and 2,=20
using Low pass 1, and High pass .05..   These filters did =
nothing on=20
channel 3 so I posted it unfiltered.
Perhaps someone can look at all three, =
to see if I=20
have a problem.   I don't think it is over damped, if anything =
it is=20
under.   Could this be the direction the channel is=20
facing?
 
Thanks, Ted