PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/07-11:57:40
G01     127.8          11.0               -1.0 +/-   26.40      -2.9 +/-   26.40  0.040 / 0.040
G07     49.7           69.6                5.2 +/-    0.65       5.5 +/-    0.65  0.030 / 0.030
G08     50.4           39.0                3.9 +/-    1.14       5.7 +/-    1.14  0.030 / 0.020
G09     176.5          35.1                6.4 +/-    0.84      10.2 +/-    0.84  0.030 / 0.030
G11     118.2          34.8                5.4 +/-    0.96       8.6 +/-    0.96  0.180 / 0.380
G13     321.3          11.0               -4.5 +/-   13.12     -12.2 +/-   13.12  0.240 / 0.450
G17     199.4          14.7                3.6 +/-    4.72       9.1 +/-    4.72  0.180 / 0.280
G18     104.2          16.1                3.1 +/-    1.74       7.6 +/-    1.74  0.340 / 0.280
G28     274.3          52.2                6.1 +/-    2.74       7.5 +/-    2.74  0.150 / 0.230
G30     330.0          58.5                3.9 +/-    0.64       4.5 +/-    0.64  0.110 / 0.260