PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-22:13:10
G01     228.0          18.6                8.9 +/-    2.20      20.3 +/-    2.20  0.030 / 0.030
G03     291.7          66.5               10.1 +/-    0.66      10.9 +/-    0.66  0.030 / 0.030
G14     84.8           25.6               10.5 +/-    1.39      20.2 +/-    1.39  0.060 / 0.070
G16     152.5          41.3               14.5 +/-    0.86      20.6 +/-    0.86  0.040 / 0.080
G22     223.9          72.6               11.1 +/-    0.25      11.6 +/-    0.25  0.060 / 0.090
G23     305.4          35.3               10.9 +/-    1.43      17.3 +/-    1.43  0.060 / 0.070
G26     104.3          54.1               11.7 +/-    0.54      14.1 +/-    0.54  0.090 / 0.130
G31     43.8           35.6                9.4 +/-    1.42      14.8 +/-    1.42  0.140 / 0.180