Table 1.

Calibration data taken with a <2kBq ${}^{228}$Th source placed at different heights. The reported position corresponds to the absolute distance moved from the parking position on top of the experiment. The upper-most and lower-most HPGe detectors are situated at about 8180 and 8560 mm respectively

Position	Live time	Random
[mm]	[h]	Coincidences
8220	6.4	7.5( 6)%
8405	4.3	7.2(10)%
8570	3.6	10.2(14)%