Table 1 Comparison of the value of the inflation factor (f) and σvig in the unit of mm/km
Year | Mixed-pair | Station-pair | Satellite-pair | Kp index | Data | |||
|---|---|---|---|---|---|---|---|---|
f | σvig | f | σvig | f | σvig | |||
01/01/2009 | – | – | – | – | – | – | 2.7 | Insufficient |
01/01/2010 | – | – | – | – | – | – | 1 | Insufficient |
01/01/2011 | – | – | – | – | – | – | 2 | Insufficient |
01/01/2012 | 1.6 | 6.65 | 2.2 | 4.55 | 1.3 | 4.38 | 1.7 | Sufficient |
01/01/2013 | 1.7 | 5.91 | 1.8 | 4.35 | 1.3 | 4.48 | 0.7 | Sufficient |
04/01/2014 | 2.0 | 7.10 | 2.3 | 6.27 | 1.2 | 5.21 | 2.3 | Sufficient |
01/01/2015 | 1.6 | 4.73 | 2 | 4.51 | 1.7 | 3.75 | 2.3 | Sufficient |
03/01/2016 | 1.5 | 5.64 | 2.6 | 4.45 | 1.7 | 3.33 | 2.7 | Sufficient |
02/01/2017 | 1.9 | 5.60 | 2.0 | 4.23 | 2.0 | 3.37 | 2.3 | Sufficient |
03/01/2018 | 1.4 | 4.46 | 1.8 | 4.42 | 1.3 | 4.18 | 1.0 | Sufficient |
01/01/2019 | 1.8 | 5.56 | 2 | 4.18 | 1.4 | 3.78 | 2.7 | Sufficient |