PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-13:43:00
G01     121.0          16.5                7.8 +/-    1.47      18.8 +/-    1.47  0.030 / 0.040
G07     74.6           67.6                6.5 +/-    0.67       7.0 +/-    0.67  0.030 / 0.040
G08     45.7           32.9                5.5 +/-    0.81       9.0 +/-    0.81  0.040 / 0.090
G09     176.1          26.8                8.3 +/-    2.15      15.5 +/-    2.15  0.050 / 0.080
G11     108.9          39.1                8.0 +/-    0.75      11.9 +/-    0.75  0.030 / 0.040
G13     318.6          17.8                5.8 +/-    2.23      13.5 +/-    2.23  0.030 / 0.050
G17     201.2          22.2                8.0 +/-    3.28      16.7 +/-    3.28  0.100 / 0.210
G18     96.2           20.0                7.3 +/-    0.69      16.0 +/-    0.69  0.080 / 0.210
G28     288.5          56.4                6.9 +/-    0.67       8.1 +/-    0.67  0.100 / 0.220
G30     341.4          66.2                5.8 +/-    0.41       6.3 +/-    0.41  0.110 / 0.220