- 456: SONICS , Site none, Thu 25-Oct-1990 16:57:15 GMT, Removed Gill anemometer about 15:00. P
Removed Gill anemometer about 15:00. Prior
to removing it, I blocked the signal, which
should have put some reference voltages on
the analog output.
- 467: SONICS , Site none, Sat 27-Oct-1990 00:31:27 GMT, Moved level output from 13 m to 7 m
Moved level output from 13 m to 7 m
at 00:25.
- 490: SONICS , Site none, Tue 30-Oct-1990 00:22:36 GMT, Sonic zero tests:
Sonic zero tests:
These are all pretty rough - there were typically LOTS of spikes with the zero
chamber on and xstrip/marigold had problems in the middle of everything.
Nevertheless, here they are:
U V W
ATI.13 -.2 -.1 -.42
ATI.7 -.03 -1.0 +.00
ATI.4 -1.15 +.08 +.23
None were done on the UW sonic, since xstrip now displays u,v,w
instead of a,b,c. Next time, we'll use rserial instead on
these channels.
P.S. These values are consistant with the values from graph_mean
today. Note that since the value of +1.0 for ATI.7.V was obtained from
rserial it was negated as per the calibration routine.
- 506: SONICS , Site none, Wed 31-Oct-1990 19:07:54 GMT, Sonic at ati.7m v component has noise.
Sonic at ati.7m v component has noise. Looks like fine
hash on an otherwise good signal.
- 550: SONICS , Site none, Mon 05-Nov-1990 19:58:50 GMT, Read sonic zero winds with rserial,
Read sonic zero winds with rserial,
finishing at 19:20. Charlie recorded
samples of the output from rserial
and placed them in the files
results/ati/sat1.u, etc. and
results/uw/suw1.a, etc.
I plotted histograms of each sample with Splus.
Most of the ati sonics had multiple modes with
a spacing of 11-12 counts. This indicates
mistriggering with various numbers of false
counts included in the 10 sample averages output
by the sonic.
Some of the ati channels may be okay. The resulting
means were:
sat1.v: -9.5 +/- 1.4 counts (55 samples minus 8 > 0 counts)
sat2.u: -16.5 +/- 1.8 counts (55 samples minus 2 @-5 counts)
sat2.w: 0.2 +/- 0.5 counts (55 samples)
sat3.u: -0.5 +/- 1.0 counts (55 samples minus 4 > 5 counts)
The uw sonics did not appear to have this problem.
The resulting means were:
suw1.a: -109.5 +/- 3.8 counts (54 samples)
suw1.b: -16.7 +/- 3.9 counts (54 samples)
suw1.c: 12.7 +/- 3.0 counts (54 samples)
suw2.a: 207.1 +/- 3.1 counts (45 samples)
suw2.b: -151.3 +/- 2.9 counts (45 samples)
suw2.c: 160.3 +/- 3.2 counts (37 samples)
In all of the preceeding cases, the median values were within
less than 1 count of the mean.
- 580: SONICS , Site none, Fri 09-Nov-1990 22:36:47 GMT, ATI.7m played with
ATI.7m played with
I just did 2 things with this sonic:
- reseated UR2, this fixed the -30 m/s values we were getting
- ADJUSTED THRESHOLD on VR1. I think I got it to where it should be - it
was on the edge, so I raised the threshold to get the next pulse.
No zero was done since the winds were too strong.
- 587: SONICS , Site none, Sat 10-Nov-1990 15:36:47 GMT, sonics adjusted last night
sonics adjusted last night
about 2320-0000 GMT, steve&steve went out to tweek the some sonic channels
which were spiking. The following channels were adjusted SLIGHTLY to
lessen the number of spikes. Note that the zeros shouldn't have been
affected.
- u.4m, w.4m, u.13m (I think)
- 588: SONICS , Site none, Sat 10-Nov-1990 15:38:36 GMT, All u.ati's spiking heavily
All u.ati's spiking heavily
This is obvious this morning from xstrip on all ati.u channels.
Winds are about 10 m/s directly along the u axis.
- 601: SONICS , Site none, Sun 11-Nov-1990 23:42:34 GMT, level cables just switched from 7m to 1
level cables just switched from 7m to 13m