ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
1172
|
Wed Dec 3 20:10:09 2008 |
Jenne, Rana | Update | PEM | Comparing Wiener subtraction with different seismometers | Attached is a plot of MC_L, and then the residual
MC_L after static Wiener filtering, using
different combinations of our accelerometers |
|
1173
|
Wed Dec 3 20:36:07 2008 |
Jenne, Rana | Update | PEM | Comparing Wiener subtraction with different seismometers | The Ranger has now been moved over to sit
underneath the MC2 tank (it was previously
close to the PSL rack). It
|
  |
1174
|
Thu Dec 4 13:49:39 2008 |
Jenne | Update | PEM | More of: Comparing Wiener subtraction using different sensors | Here is another version of the same type plot
I put in the elog yesterday. This plot is
looking at the 7200 seconds after 04Dec2008 |
|
1219
|
Fri Jan 9 09:14:17 2009 |
steve | Update | PEM | ifo is recovered after eq | There is no obvious damage from last night
earth quake.
All sus dampings were turned on, MC locked |
|
1337
|
Wed Feb 25 11:48:02 2009 |
Jenne | Update | PEM | Wiener filtering update - work on filtering some S5 DARM_CTRL data | Quick update on my wiener filtering status:
Joe has been helping me get on the
GRID, so I now have a grid certificate, |
 |
1347
|
Tue Mar 3 08:44:31 2009 |
steve | Update | PEM | air cond. maintenance today | IFO room 104 air conditions will be shut
down for maintenance today.
This
should be finished by noon.
The |
|
1411
|
Fri Mar 20 11:01:02 2009 |
steve | Update | PEM | particle counts are high | The outside particle counts for 0.5 micron
are 3 million this morning at 9am. Low clouds,
foggy condition with low inversion layer. |
|
1447
|
Tue Mar 31 09:42:32 2009 |
steve | Update | PEM | ETMY sus damping restored again | The Caltech gasoline storage tank is being
upgraded.
They are jack hammering and digging |
|
1453
|
Fri Apr 3 14:52:38 2009 |
Jenne | Omnistructure | PEM | Guralp is finally back! | After many, many "it'll be there in
2 weeks" from the Guralp people, our
seismometer is finally back! |
|
1455
|
Mon Apr 6 19:09:15 2009 |
Jenne | Update | PEM | Old Guralp is hooked back up to the ADC | Old Guralp is hooked back up, the new one
is sitting next to it, disconnected for now. |
|
1528
|
Tue Apr 28 12:55:57 2009 |
Caryn | DAQ | PEM | Unplugged Guralp channels | For the purpose of testing out the temperature
sensors, I stole the PEM-SEIS_MC1X,Y,Z channels.
I unplugged Guralp NS1b, Guralp Vert1b, |
|
1540
|
Sat May 2 16:34:31 2009 |
caryn | DAQ | PEM | Guralp channels plugged back in | I plugged the Guralp cables back into the
PEM ADCU
|
|
1546
|
Tue May 5 09:22:46 2009 |
caryn | Update | PEM | zeros | For several of the channels on the PEM
ADCU, zeros are occuring at the same time.
Does anyone know why that might happen or |
 |
1566
|
Fri May 8 16:03:31 2009 |
Jenne | Update | PEM | Update on Jenne's Filtering Stuff | To include the plots that I've been working
on in some form other than on my computer,
here they are: |
 |
1571
|
Sun May 10 13:34:32 2009 |
caryn | Update | PEM | Unplugged Guralp channels | I unplugged Guralp EW1b and Guralp Vert1b
and plugged in temp sensors temporarily.
Guralp NS1b is still plugged in. |
|
1597
|
Mon May 18 01:54:35 2009 |
rana | Update | PEM | Unplugged Guralp channels | To see if Caryn's data dropouts were happening,
I looked at a trend of all of our temperature
channels. Looks OK now.
|
|
1599
|
Mon May 18 10:06:56 2009 |
caryn | Update | PEM | Temp sensor | [quote]To see if Caryn's data dropouts were
happening, I looked at a trend of all of
our temperature channels. Looks OK now.
|
  |
1600
|
Mon May 18 15:31:11 2009 |
rana | Update | PEM | Temp sensor | [quote]Picture of cooler for posterity is
attached[/quote]
|
|
1606
|
Tue May 19 15:54:29 2009 |
Jenne | Update | PEM | More Plots for the S5 H1:DARM Wiener Filtering.... | Even more plots for the Wiener filtering!
We have a set of spectrograms, which
show (in color) the amplitude spectrum, at |
6x |
1612
|
Wed May 20 09:55:18 2009 |
steve | Update | PEM | oplev servos turned off | All oplevs servos turned off to protect
our suspentions from vibration due to drilling
and pounding in CES high bay area. |
|
1624
|
Mon May 25 21:31:47 2009 |
caryn | Update | PEM | plugged in Guralp channels | Guralp Vert1b and Guralp EW1b are plugged
back in to PEM ADCU #10 and #12 respectively.
Guralp NS1b remains plugged in. So, |
|
1647
|
Wed Jun 3 11:28:01 2009 |
caryn | Update | PEM | Unplugged Guralp channels | |
|
1648
|
Wed Jun 3 12:31:13 2009 |
caryn | Update | PEM | plugged in guralp channels | |
|
1653
|
Thu Jun 4 23:39:23 2009 |
pete | Update | PEM | 5 days, 20 days of accelerometers | Looks like yesterday was particularly noisy.
It's unclear to me why diurnal variation
much more visible in MC1_Y, and why the floor |
 |
1665
|
Wed Jun 10 09:06:12 2009 |
steve | Update | PEM | particle counts and turbulance | I moved the mobile HEPA filter from ITMX's
north door to ITMX-ISCT and covered it up
with a merostate tent to accommodate the |
|
1692
|
Tue Jun 23 23:14:36 2009 |
Clara | Configuration | PEM | Accelerometers relocated | Both accelerometers have been moved in
an attempt to optimize their positions. The
MC1 accelerometer was moved from one green |
|
1696
|
Wed Jun 24 12:04:00 2009 |
Clara | Update | PEM | accelerometer clarification | When I said "MC1/MC2 accelerometers,"
I meant the entire three-axis accelerometer
set at each point. |
|
1698
|
Wed Jun 24 12:09:24 2009 |
Clara | Update | PEM | Week 1(ish) | I spent the week reading up on filter algorithm
theory, particularly Wiener filtering. I
have also learned how to get data from specific |
|
1703
|
Thu Jun 25 21:00:30 2009 |
Clara | Update | PEM | MC1 Accelerator set moved again; new XLR cables | I moved the MC1 set of accelerators. Might
have bumped things. If things aren't working,
look around the MC1 chamber. |
|
1704
|
Fri Jun 26 15:22:28 2009 |
Clara | Update | PEM | XLR cables tested and labeled | We now have two 80-foot, female-to-female
XLR cables for our pretty new microphones,
one yellow and one purple. They have been |
 |
1705
|
Fri Jun 26 18:00:36 2009 |
Jenne | Update | PEM | New PEM channels for the fancy-pants new microphones | [ Jenne, Clara ]
We made new channels for the microphones
which came in this week, by editing C1ADCU_PEM.ini |
|
1707
|
Sat Jun 27 02:48:09 2009 |
Clara | Update | PEM | I moved accelerometers and made some pretty pictures | I have been working on finding the best
spots to put the accelerometer sets in order
to best subtract out noise (seismometers |
6x |
1708
|
Sat Jun 27 03:16:16 2009 |
Clara | Update | PEM | Exciting microphone things! | So, I'm double-posting, but I figured the
last post was long enough as it was, and
this is about something different. After |
  |
1713
|
Thu Jul 2 05:27:12 2009 |
Clara | Update | PEM | Voltage Divider Oops | I tested the voltage dividers and was getting
up to about 3V. I retested the mic w/o the
voltage divider in place, and, lo and behold, |
|
1714
|
Thu Jul 2 06:31:35 2009 |
Clara | Update | PEM | First mic in place and connected | I clamped Bonnie (microphone) to the top
of a chamber near the vertex of the arms
and placed Clyde (pre-amp) on the table right |
|
1715
|
Thu Jul 2 16:45:06 2009 |
Clara | Update | PEM | Bonnie and Clyde are officially in operation! (Butch Cassidy and the Sundance Kid are in temp position) | I hooked up Bonnie and Clyde last night
and tested it today. First I tried some loud
noises to make sure I could identify them |
  |
1723
|
Wed Jul 8 12:36:15 2009 |
Clara | Update | PEM | Coherences and things | After setting up the microphones last week,
I modified the Wiener filtering programs
so as to include the microphone signals. |
7x |
1726
|
Wed Jul 8 19:42:37 2009 |
Clara | Update | PEM | Bonnie moved to PSL, getting some coherence with the PMC_ERR channel | In her position overlooking whichever table
it is that is next to the PSL, Bonnie drummed
up some decent coherence with the PSL-PMC_ERR |
  |
1727
|
Thu Jul 9 02:18:09 2009 |
rana | Update | PEM | Bonnie moved to PSL, getting some coherence with the PMC_ERR channel | My guess is that we need a different acoustic
strategy. The microphones are mainly for
high frequencies,
|
|
1728
|
Thu Jul 9 19:05:32 2009 |
Clara | Update | PEM | more mic position changes; mics not picking up high frequencies | Bonnie has been strung up on bungees in
the PSL so that her position/orientation
can be adjusted however we like. She is now |
6x |
1729
|
Thu Jul 9 19:24:50 2009 |
rana | Update | PEM | more mic position changes; mics not picking up high frequencies | Might be the insidious 850 Hz AA filters in
the black AA box which precedes the ADC.
|
|
1744
|
Tue Jul 14 16:31:46 2009 |
Clara | Update | PEM | Frequency Response of Microphone (Bonnie) | So, I actually took these measurements
last week, but I didn't get around to making
nice plots and things until now. I figured |
 |
1757
|
Thu Jul 16 10:52:58 2009 |
Clara | Update | PEM | Single Channel TRS-RNC Cable | I made and tested a female-to-female TRS(audio)-RNC
cable. It only has a single channel, so it
won't work for stereo speakers or anything, |
|
1760
|
Fri Jul 17 18:04:54 2009 |
Clara | Update | PEM | Guralp Box Fail | I've been trying for most of the week to
get noise measurements on the output of the
Guralp box as well as scross the AD640 chip. |
  |
1761
|
Sat Jul 18 19:49:48 2009 |
rana | Update | PEM | Guralp Box Fail | That's terrible: R5 & R8 should definitely
be 100 Ohm and not 100kOhm. 100k would make
it a noise disaster. They should also be |
  |
1765
|
Mon Jul 20 17:06:29 2009 |
Jenne | Update | PEM | Guralp Box Fail | [quote]That's terrible: R5 & R8 should definitely
be 100 Ohm and not 100kOhm. 100k would make
it a noise disaster. They should also be |
|
1767
|
Tue Jul 21 13:55:08 2009 |
Clara | Update | PEM | Guralp Box Success! | There managed to be just enough 100 kOhm
resistors to stuff all the "2"
channels (VERT2, N/S2, E/W2) with the fancy |
|
1800
|
Tue Jul 28 16:03:14 2009 |
Clara | Update | PEM | Guralp Seismometer cable pin diagram | I mapped out the corresponding pins on
both ends of the Guralp seismometer cable.
Here is the diagram: |
|
1806
|
Wed Jul 29 13:15:35 2009 |
Clara | Update | PEM | Dents = Bad?? | I was in the lab last night accelerometerizing
and noticed some dents on the tubes that
stick out horizontally from the MC2 optical |
  |
1808
|
Wed Jul 29 14:56:44 2009 |
Jenne | Update | PEM | MiniEarthquakes due to construction | The construction people next door seem
to be getting pretty excited about pounding
things lately. At my desk the floor |
|