PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/04-13:43:10
G01     50.4           25.5                9.1 +/-    2.42      17.6 +/-    2.42  0.080 / 0.180
G06     178.3          24.3               11.5 +/-    2.83      22.8 +/-    2.83  0.130 / 0.140
G07     145.8          10.6               10.3 +/-    4.98      28.5 +/-    4.98  0.120 / 0.250
G11     44.2           13.3                6.2 +/-    2.39      16.1 +/-    2.39  0.130 / 0.260
G13     253.5          30.5                9.9 +/-    1.72      17.1 +/-    1.72  0.040 / 0.040
G15     286.0          15.6                6.3 +/-    0.94      15.5 +/-    0.94  0.040 / 0.060
G17     326.5          78.7                8.3 +/-    0.52       8.5 +/-    0.52  0.020 / 0.020
G19     247.7          61.7                9.1 +/-    0.79      10.2 +/-    0.79  0.020 / 0.020
G28     52.3           52.8                8.1 +/-    0.93       9.9 +/-    0.93  0.090 / 0.210
G30     149.5          43.5               10.5 +/-    0.67      14.5 +/-    0.67  0.090 / 0.180