PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-14:42:40
G01     95.5           30.1                7.6 +/-    0.74      13.2 +/-    0.74  0.030 / 0.020
G07     121.2          46.2                9.5 +/-    0.58      12.6 +/-    0.58  0.040 / 0.030
G08     41.9           9.8                 5.9 +/-    1.83      16.5 +/-    1.83  0.040 / 0.050
G11     72.4           38.9                7.5 +/-    1.99      11.2 +/-    1.99  0.050 / 0.040
G13     301.7          32.8                5.9 +/-    1.69       9.7 +/-    1.69  0.060 / 0.130
G17     210.7          51.3                9.2 +/-    0.81      11.4 +/-    0.81  0.050 / 0.130
G19     212.3          24.3               10.5 +/-    2.06      20.8 +/-    2.06  0.060 / 0.110
G28     339.4          61.7                7.7 +/-    0.48       8.6 +/-    0.48  0.060 / 0.090
G30     69.6           80.0                6.7 +/-    0.60       6.8 +/-    0.60  0.030 / 0.040