David.M, Jenne.D
Yesterday I set up the sensors for the Newtonian noise L4C array in the beer garden. There are 31 sensors there in total (30 for the array and 1 spare), I arranged them in a huddle beneath the stairs near the STS-2. 20 of them are plugged into the two chassis located in the beer garden which correspond to the first 20 L4C channels. The other chassis is located external to the beer garden next to HAM2, I only connected two sensors to this rack because of a lack of long cables. The channels with these two sensors are L4C channels 26 and 30. I've attached a table which states which serial number L4C is connected to which channel for reference. Also attached are a photo of the current sensor huddle as well as an initial plot of the sensor spectrums calibrated to the STS-2 (thick black line).
The sensors themselves are each only touching the floor (despite what it looks like in the photo), although each wire touches many other wires and don't have any proper strain relief yet. The sensors currently being recorded are the ones more closely huddled together in the photo. The ones which are seperated slightly off to the left are the currently unrecorded L4Cs.
A second huddle was performed by swapping out channels 11 to 18 with the 8 sensors that had not yet been tested. This swap occured on 6/28/16, the sensors listed on those channels for the original huddle were swapped out on that date and replaced with the new L4Cs. The table attached to this comment lists all L4C serial numbers along with the channel number they were connected to during the huddle (3rd column, the 5th column is the current channel for the array), and also the start and stop dates for when that L4C was connected in the huddle. If the L4C was never swapped out, both dates on this range are blue. The date 6/28/16 is in red to make it obvious that the L4C was swapped in or out on that date.
