PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-12:42:50
G01     73.8           33.0                5.4 +/-    0.98       8.8 +/-    0.98  0.110 / 0.070
G07     135.7          31.0                6.1 +/-    1.02      10.5 +/-    1.02  0.100 / 0.090
G11     54.8           30.4                4.7 +/-    2.15       8.1 +/-    2.15  0.040 / 0.030
G15     306.5          14.0                4.0 +/-    2.22      10.2 +/-    2.22  0.040 / 0.020
G17     229.9          69.4                6.5 +/-    0.75       6.9 +/-    0.75  0.050 / 0.070
G19     222.3          41.5                8.6 +/-    1.87      12.3 +/-    1.87  0.060 / 0.080
G28     15.4           59.7                5.4 +/-    0.88       6.1 +/-    0.88  0.100 / 0.240
G30     131.1          66.2                6.0 +/-    1.21       6.5 +/-    1.21  0.080 / 0.220