Open Access
Table 1
Observation summary by year.
| Year | Runs | Livetime (h) | Average zenith angle (◦) | Average optical Efficiency |
|---|---|---|---|---|
| 2004 | 99 | 44.6 | 20.7 | 0.80 |
| 2005 | 116 | 53.0 | 22.7 | 0.68 |
| 2006 | 36 | 16.6 | 18.7 | 0.63 |
| 2007 | 15 | 7.0 | 11.1 | 0.63 |
| 2008 | 24 | 11.0 | 15.4 | 0.58 |
| 2009 | 7 | 3.2 | 15.5 | 0.57 |
| 2010 | 19 | 12.1 | 11.4 | 0.63 |
| 2011 | 19 | 8.6 | 32.3 | 0.63 |
| 2012 | 84 | 37.4 | 19.2 | 0.66 |
| 2013 | 105 | 47.2 | 22.8 | 0.66 |
| 2014 | 120 | 53.6 | 19.7 | 0.63 |
| 2015 | 57 | 24.8 | 17.3 | 0.63 |
| 2016 | 11 | 5.0 | 12.5 | 0.59 |
| 2017 | 2 | 0.8 | 25.5 | 0.85 |
| 2018 | 14 | 6.3 | 21.6 | 0.82 |
| 2019 | 49 | 21.4 | 33.4 | 0.77 |
| Dataset | 777 | 352.7 | 20.6 | 0.68 |
Notes. Number of runs after run quality selection, total live-time, average zenith angle, and average optical efficiency measured from muon images1, for each year and for the full dataset.
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