Table 1 Measurement conditions and results of the AQG repeatability assessment, sorted in chronological order. For convenience, measurements are expressed relative to g0, which is taken arbitrarily as the average of the six measurements. The statistical uncertainty indicated in the table and used for the error bars in Fig. 6 is the standard deviation of the corresponding dataset, calculated after averaging the data over 1 h. The difference between the two measurements for each pillar is 16.9–40.5 = −23.6 nm.s−2 for NE, 5.1 nm.s−2 for NW and 1.8 nm.s−2 for SE.

From: Gravity measurements below 10−9 g with a transportable absolute quantum gravimeter

Measurement

Pillar

Date

Duration (h)

g − g0 (nm.s−2)

Statistical uncertainty (nm.s−2)

1

NE

6 Sept 2017

124

40.5

24.3

2

NW

11 Sept 2017

20

44.3

16.9

3

SE

12 Sept 2017

23.5

−76.5

15.8

4

NE

13 Sept 2017

7.5

16.9

34.5

5

SE

13 Sept 2017

18.5

−74.7

13.9

6

NW

14 Sept 2017

18

49.4

19.6