PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/17-02:12:40
G01     120.1          14.9                7.5 +/-    1.99      18.6 +/-    1.99  0.030 / 0.040
G07     68.0           68.6                5.1 +/-    0.68       5.4 +/-    0.68  0.030 / 0.030
G08     46.5           33.8                2.9 +/-    2.49       4.7 +/-    2.49  0.050 / 0.060
G09     173.7          26.2                4.3 +/-    1.37       8.1 +/-    1.37  0.100 / 0.070
G11     117.5          39.4                5.9 +/-    0.88       8.7 +/-    0.88  0.080 / 0.120
G13     318.9          17.5                4.0 +/-    2.20       9.4 +/-    2.20  0.090 / 0.130
G17     199.6          20.8                4.6 +/-    1.68      10.0 +/-    1.68  0.060 / 0.110
G28     274.4          48.7                4.7 +/-    2.82       6.0 +/-    2.82  0.060 / 0.090
G30     332.7          61.8                3.6 +/-    0.59       4.0 +/-    0.59  0.170 / 0.270