PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-23:27:40
G02     199.5          19.9               14.7 +/-    1.77      32.3 +/-    1.77  0.180 / 0.180
G06     171.7          51.6               13.7 +/-    0.67      16.9 +/-    0.67  0.200 / 0.110
G13     229.2          14.5               14.3 +/-    1.59      36.1 +/-    1.59  0.080 / 0.030
G17     11.1           64.8               11.5 +/-    0.62      12.5 +/-    0.62  0.070 / 0.040
G19     313.1          71.1               11.4 +/-    0.41      12.0 +/-    0.41  0.040 / 0.020
G24     311.5          27.9               10.3 +/-    0.92      18.9 +/-    0.92  0.040 / 0.020
G28     85.9           40.6               12.1 +/-    1.43      17.5 +/-    1.43  0.040 / 0.070
G30     156.3          15.0               14.8 +/-    2.47      36.7 +/-    2.47  0.050 / 0.090