J. Kissel, D. Barker, J. Warner
WP 7826, 7848
ECRs E1800271, E1800268
IIET Tickets 11564, 11552

Over the course of O1 and O2, the h1oaf front end model (and associated computer h1oaf0) served as prototyping playground in what was originally conceived as an "Online Adaptive Filtering" or OAF computational machine. Now that 
    - the OAF computer is now two computers, one with a faster processing speed and more cores (a.k.a. h1oaf1), 
    - front-end computers and associated models can be run without an associated I/O chassis, and
    - we have long-range dolphin network systems that replace the reflected memory for communication down the arms,
we are re-organizing and pruning of content of what was previously all inside the h1oaf user model. See lots of details about the re-oragnization and proposed changes in the presentation G1801962 associated with the above mentioned ECR E1800271.

Today, we've done two parts of this change:
(1) We've created and installed a brand new front end model (with DCUID 118, on specific_cpu=6, of h1oaf1) called h1seiproc. This model now contains
   (a) The projections of ISI GS13s -- that have already been projected into their respective suspensions longitudinal motion of the suspension point -- into the interferometer degrees of freedom (at the suspension point; it does not *yet* include the dynamical response of the optic from motion at the suspension point). Because we don't want to have to re-draw MEDM screens, we've retained the OAF_SUSPOINT channel name structure using the top_names feature of the RCG.
   (b) Brand new prototype code that is producing common mode ground motion that will eventually be used for earthquake mitigation (see above mentioned ECR E1800268)
See the first 6 attachments that show the content of this new model.

(2) We've pruned out all of the content that has now been moved over to the h1seiproc model, and along the way, removed any "abandonware," i.e. prototypes of the above mentioned projection matrices, and other online adaptive (wiener) filtering prototypes. See last attachment that shows what little is left over. 

Note, there are two things that L1 has and uses that will eventually go into the seiproc model, that have not yet been installed:
   (a) The latest and greatest attempt at online adaptive wiener filtering 
   (b) A test signal constructed of a combination of HAM6 accelerometers and ground seismometers. 
There's no party actively using these, so we'll wait for a less hectic maintenance day to install those lower priority infrastructure.

Finally, there remains content that will eventually become two more brand new susproc and iscproc models, but more details on that later. Since it's been so long since we created a brand new model, we want to see how well the creation seiproc goes before we create the rest of the new content.