PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-12:57:40
G02     201.8          16.8                3.5 +/-    1.74       8.3 +/-    1.74  0.100 / 0.190
G06     169.3          54.7                5.3 +/-    1.18       6.3 +/-    1.18  0.110 / 0.170
G13     227.0          13.2                4.0 +/-    3.57      10.3 +/-    3.57  0.050 / 0.040
G17     23.7           58.7                3.6 +/-    0.45       4.1 +/-    0.45  0.060 / 0.040
G19     306.9          69.7                3.6 +/-    0.73       3.8 +/-    0.73  0.080 / 0.110
G24     308.6          31.7                4.1 +/-    0.94       7.0 +/-    0.94  0.090 / 0.120
G28     87.2           40.5                4.8 +/-    0.64       6.9 +/-    0.64  0.170 / 0.580
G30     157.7          16.1                4.9 +/-    1.77      11.8 +/-    1.77  0.230 / 0.530