PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/09-09:42:40
G01     127.7          11.0               -9.1 +/-   30.31     -24.9 +/-   30.31  0.030 / 0.030
G07     51.7           69.4                5.3 +/-    0.65       5.6 +/-    0.65  0.030 / 0.030
G08     50.2           38.7                4.2 +/-    1.22       6.3 +/-    1.22  0.220 / 0.350
G09     174.9          32.9                6.0 +/-    1.66       9.9 +/-    1.66  0.310 / 0.330
G11     117.9          35.0                7.6 +/-    0.82      12.1 +/-    0.82  0.180 / 0.370
G13     321.2          11.2               -4.5 +/-   10.79     -12.3 +/-   10.79  0.200 / 0.380
G17     199.3          15.2                4.4 +/-    1.77      11.0 +/-    1.77  0.030 / 0.020
G18     103.4          16.2                6.2 +/-    1.61      14.9 +/-    1.61  0.030 / 0.020
G28     273.9          51.8                6.2 +/-    2.74       7.7 +/-    2.74  0.180 / 0.240
G30     329.9          58.6                3.9 +/-    0.43       4.5 +/-    0.43  0.130 / 0.250