We have the Gurlap seismometer working, and it took data overnight (mostly) successfully. The North-South channel was not turned on, but as of this morning all three channels (North-South, East-West, and Vertical) are up and running. I've attached a plot of some data for the E-W and Vert channels comparing the noise at 3am and 11am. We calibrated the data by first converting from counts to m/s by multiplying by 40V/2^16*(1/802V/(m/s)). The 802V/(m/s) calibration comes from the Guralp spec sheet (which I've attached as a pdf). The calibration for all three channels is different, but the difference is less than 1%, so I've just chosen the calibration value for East-West and used it for all channels.
The channel names are
Vertical-- C2:ATF-GENERIC_DOF6_OUT_DAQ
North-South-- C2:ATF-GENERIC_DOF7_OUT_DAQ
East-West-- C2:ATF-GENERIC_DOF8_OUT_DAQ
After we have 24 hours of data, we'll make plots for more times on all three channels. |