PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/25-08:58:00
G01     120.3          16.9                4.0 +/-    0.77       9.6 +/-    0.77  0.030 / 0.040
G07     78.5           66.6                5.8 +/-    0.83       6.2 +/-    0.83  0.030 / 0.040
G08     44.8           30.8                2.7 +/-    0.71       4.7 +/-    0.71  0.110 / 0.240
G09     173.6          22.8                7.1 +/-    1.40      14.6 +/-    1.40  0.110 / 0.300
G11     106.8          39.5                5.9 +/-    0.62       8.7 +/-    0.62  0.080 / 0.200
G13     318.2          18.7                3.1 +/-    1.52       7.1 +/-    1.52  0.090 / 0.210
G17     200.6          24.7                5.0 +/-    0.89       9.7 +/-    0.89  0.030 / 0.040
G18     94.1           20.2                5.0 +/-    0.78      10.9 +/-    0.78  0.030 / 0.040
G28     288.6          56.2                4.7 +/-    0.67       5.5 +/-    0.67  0.040 / 0.050
G30     341.0          66.3                3.1 +/-    0.69       3.4 +/-    0.69  0.040 / 0.050