PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/06-09:27:50
G07     329.2          56.5                4.9 +/-    0.26       5.8 +/-    0.26  0.040 / 0.050
G08     104.2          49.8                6.9 +/-    0.82       8.7 +/-    0.82  0.040 / 0.060
G09     190.3          77.1                5.8 +/-    0.57       5.9 +/-    0.57  0.030 / 0.030
G11     147.2          9.9                -5.8 +/-    6.38     -16.1 +/-    6.38  0.030 / 0.030
G16     44.9           13.8                3.3 +/-    1.03       8.5 +/-    1.03  0.120 / 0.120
G23     154.0          49.1                7.5 +/-    0.54       9.5 +/-    0.54  0.100 / 0.100
G27     59.3           33.2                5.6 +/-    1.01       9.2 +/-    1.01  0.090 / 0.290
G28     233.7          25.9                5.9 +/-    2.94      11.4 +/-    2.94  0.180 / 0.260
G30     296.9          30.3                5.5 +/-    1.93       9.5 +/-    1.93  0.040 / 0.040