PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-17:57:40
G02     209.5          47.6               12.5 +/-    0.80      16.3 +/-    0.80  0.070 / 0.120
G06     97.9           78.7               11.0 +/-    0.51      11.2 +/-    0.51  0.060 / 0.120
G12     315.6          29.9               10.3 +/-    2.00      18.0 +/-    2.00  0.050 / 0.090
G17     48.6           39.1                8.3 +/-    0.79      12.2 +/-    0.79  0.080 / 0.070
G19     21.1           58.2                9.5 +/-    0.49      10.9 +/-    0.49  0.090 / 0.250
G24     278.5          42.9                9.2 +/-    1.00      12.8 +/-    1.00  0.080 / 0.210
G28     114.9          21.5                9.7 +/-    1.43      20.5 +/-    1.43  0.060 / 0.080