PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/04-09:28:00
G01     116.4          19.7                7.6 +/-    1.25      17.0 +/-    1.25  0.030 / 0.040
G07     89.7           63.3                5.9 +/-    0.96       6.5 +/-    0.96  0.030 / 0.040
G08     43.6           27.4                3.9 +/-    1.90       7.2 +/-    1.90  0.050 / 0.060
G09     175.6          22.0                7.1 +/-    1.11      14.9 +/-    1.11  0.060 / 0.070
G11     101.4          39.8                7.0 +/-    0.47      10.2 +/-    0.47  0.080 / 0.150
G13     317.3          19.8                3.0 +/-    1.68       6.7 +/-    1.68  0.090 / 0.150
G17     201.8          29.7                6.4 +/-    1.46      11.3 +/-    1.46  0.070 / 0.110
G28     299.1          58.6                4.6 +/-    0.64       5.3 +/-    0.64  0.060 / 0.110
G30     350.3          70.1                3.7 +/-    0.58       3.9 +/-    0.58  0.120 / 0.220