PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/06-14:58:00
G01     108.8          24.6                9.9 +/-    0.60      19.5 +/-    0.60  0.030 / 0.030
G07     104.1          59.7               10.5 +/-    0.27      12.0 +/-    0.27  0.030 / 0.040
G08     42.1           21.7                7.2 +/-    1.03      15.2 +/-    1.03  0.070 / 0.150
G09     174.4          14.1               14.1 +/-    2.17      35.9 +/-    2.17  0.060 / 0.160
G11     91.0           42.6                9.6 +/-    0.43      13.4 +/-    0.43  0.050 / 0.060
G13     310.8          27.7                8.9 +/-    1.61      16.4 +/-    1.61  0.040 / 0.070
G17     205.3          35.5               12.5 +/-    1.62      19.6 +/-    1.62  0.030 / 0.040
G18     82.1           24.0                8.7 +/-    0.81      17.5 +/-    0.81  0.030 / 0.050
G28     314.3          60.6                9.2 +/-    0.71      10.4 +/-    0.71  0.040 / 0.100
G30     13.8           77.0               10.1 +/-    1.19      10.3 +/-    1.19  0.040 / 0.090