PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-11:12:40
G01     71.6           32.9                4.2 +/-    1.16       6.9 +/-    1.16  0.090 / 0.340
G07     136.8          29.8                6.0 +/-    1.39      10.5 +/-    1.39  0.090 / 0.370
G11     53.7           29.6                3.3 +/-    0.72       5.7 +/-    0.72  0.050 / 0.110
G13     277.9          36.9                5.7 +/-    1.14       8.7 +/-    1.14  0.060 / 0.120
G15     304.2          14.8                2.6 +/-    2.54       6.6 +/-    2.54  0.040 / 0.070
G17     233.3          70.9                5.2 +/-    0.58       5.5 +/-    0.58  0.030 / 0.050
G19     223.7          43.1                6.8 +/-    0.72       9.4 +/-    0.72  0.050 / 0.100
G28     19.0           59.2                4.4 +/-    0.39       5.1 +/-    0.39  0.050 / 0.080
G30     133.7          63.7                4.2 +/-    0.57       4.6 +/-    0.57  0.030 / 0.030