PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/07-08:57:50
G01     61.0           30.8                3.3 +/-    1.04       5.8 +/-    1.04  0.040 / 0.050
G06     182.4          12.0                3.4 +/-   17.23       9.0 +/-   17.23  0.030 / 0.050
G07     141.8          22.0                7.5 +/-    1.16      15.8 +/-    1.16  0.060 / 0.110
G11     48.6           23.6                2.1 +/-    1.77       4.3 +/-    1.77  0.070 / 0.120
G13     265.6          35.2                7.4 +/-    2.23      11.7 +/-    2.23  0.020 / 0.020
G15     294.8          16.5                3.0 +/-    0.94       7.3 +/-    0.94  0.030 / 0.030
G17     260.8          77.5                6.6 +/-    0.26       6.7 +/-    0.26  0.120 / 0.210
G19     232.3          51.6                8.0 +/-    2.41       9.9 +/-    2.41  0.120 / 0.190
G28     35.3           56.6                5.1 +/-    1.02       6.0 +/-    1.02  0.170 / 0.410
G30     142.6          53.1                8.1 +/-    0.55       9.9 +/-    0.55  0.160 / 0.390