The two goals of the research on angular fluctuations will be:

1) investigate the correlation between servo signals and 
   mirror angular motion. This is to say, we want to know 
   how much of the angular motion is large enough
   to dominate the interferometer signals. 

2) investigate the cause for mirrors' angular motion: straight 
   seismic motion, control forces through cross couplings, 
   mechanical cross coupling, excess motion of the stacks, etc. 

We will work with a single arm cavity configuration, and 
preferably with both arms (that is, one at a time, but some 
time with both). 

Since we need interferometer signals, we will need the LSC-PD 
signals for the arm cavity (preferably the control signal). We 
would also like the error signal of the mode cleaner, to 
determine the frequency region which is not explained by
frequency noise. We need DC signals, but a sampling rate of 
256 Hz is enough. Thus, we request the relevant H2:LSC-AS#_I(Q?), 
at 2048 Hz and H2:IOO_MC_I at 16384 Hz (or L, at 256 Hz). 

We'd like WFS signals for the arm cavities: we know they are not 
ready to run yet, but if they are, we'd like the ASC channels for 
WFS at the reflection and antisymmetric ports, in pitch and yaw 
(H2:ASC-WFS3,4_P,Y). These are 2 channels at 2048 Hz. We will take 
care of the calibration of these signals, if needed. 

We also request the optical lever signals for the relevant ITM 
mirror, pitch and yaw: H2:ASC-QPDX(or Y)_P,Y: these are 2 channels 
sampled at 2048 Hz. It would be nice to have the similar signals 
for ASC (fast) signals for the ETM mirrors, but we understand they 
are not available yet. If not, we'll take the slow (4 or 16 Hz?) 
optical lever channels (I think they exist, but didn't find them 
in the list?)

We also want the 4 local sensor channels for the ITM and ETM of the 
arm in use: H2:SUS-ITMX(Y)-SENSOR1,2,3,4 and 
H2:SUS-ETMX(Y)-SENSOR1,2,3,4 (8 channels, at 256 Hz). 

We also want to information on beam pointing, from QPD in transmission
at the mid stations: H2:ASC-QPDX(Y)-Y1,P1 : these are 2 channels at 
2048 Hz. 


About enviromental channels, we need:

*seismometers X,Y,Z in corner station and relevant mid station 

*tiltmeters P,Y at LVEA and relevant mid-station

*accelerometers X,Y,Z in BSC where relevant ITM is, and at midstation

*magnetometers X,Y,Z in LVEA and relevant midstation.



Locking durations needed:

I think we can do most of the things we need to do with a few hours 
of each arm cavity, assuming they are "quality time". Segments
longer than 15' are probably needed, for all the transients to go 
away and a good alignment to be achieved. We'd like to have a few 
hours of each cavity (X and Y). 

Many of the investigations involving optical levers, local sensors and
environmental channels can be done without the interferometer, so 
they don't pose any requirement on the configuration or the time 
length, except that we'd like a total of a few hours with the 
interferometer "off" (which may  happen anyway).