PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-17:42:50
G02     24.0           62.9               11.3 +/-    0.94      12.5 +/-    0.94  0.120 / 0.420
G05     157.4          52.2               14.2 +/-    1.01      17.5 +/-    1.01  0.090 / 0.420
G06     49.8           22.6                8.8 +/-    0.93      18.1 +/-    0.93  0.020 / 0.030
G12     216.6          75.5               11.0 +/-    0.85      11.3 +/-    0.85  0.030 / 0.040
G19     94.8           12.9               11.2 +/-    1.57      29.4 +/-    1.57  0.040 / 0.060
G20     197.5          19.2               14.0 +/-    1.48      31.5 +/-    1.48  0.040 / 0.070
G25     304.2          51.0               11.5 +/-    0.65      14.3 +/-    0.65  0.040 / 0.050
G29     303.5          25.4               10.3 +/-    1.42      20.0 +/-    1.42  0.030 / 0.050