PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-18:42:50
G01     223.6          14.2               11.2 +/-   10.40      28.4 +/-   10.40  0.030 / 0.040
G03     267.4          71.3               11.1 +/-    0.53      11.6 +/-    0.53  0.040 / 0.050
G14     89.6           23.0               11.9 +/-    1.80      24.3 +/-    1.80  0.040 / 0.050
G16     144.0          48.8               14.4 +/-    0.79      18.5 +/-    0.79  0.030 / 0.060
G22     204.5          66.5               11.8 +/-    0.67      12.7 +/-    0.67  0.060 / 0.130
G23     311.3          41.4               12.1 +/-    0.84      17.1 +/-    0.84  0.090 / 0.200
G26     88.9           54.4               12.2 +/-    0.63      14.7 +/-    0.63  0.110 / 0.200
G31     46.9           28.3               10.0 +/-    1.78      18.2 +/-    1.78  0.120 / 0.230