PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-22:28:10
G02     207.1          46.7               14.6 +/-    0.76      19.2 +/-    0.76  0.130 / 0.120
G06     122.7          78.5               13.3 +/-    0.43      13.6 +/-    0.43  0.140 / 0.120
G12     313.3          24.5                9.0 +/-    1.18      17.9 +/-    1.18  0.070 / 0.060
G17     43.2           44.2               11.7 +/-    1.13      16.0 +/-    1.13  0.050 / 0.050
G19     18.7           59.2               11.7 +/-    0.69      13.4 +/-    0.69  0.040 / 0.020
G24     284.3          41.9                8.8 +/-    2.04      12.4 +/-    2.04  0.040 / 0.020
G28     112.5          23.5               13.5 +/-    0.89      27.3 +/-    0.89  0.090 / 0.140