I wanted to try using the buried STS at ETMY for sensor correction when it wasn't windy, to see if it worked. On the 22nd, for half an hour or so I switched it, and it seems to work. Attached spectra shows that using the buried STS gives similar performance to the STS in the building, at least when the wind is low, and we are using sensor correction at the micrseism. Red and pink are the ST1 T240 and buried STS when using the buried STS, dark blue and light blue are the ST1 T240 and the inside STS when running in our normal configuration. Both measurements were taken with the 90mhz blends, so all of the isolation between the T240 and ground between .1 and ~.2 hz is due to the sensor correction.

Unfortunately, when I tried this when it was windy, I got no isolation at all. I'm still looking into that.