PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/27-07:27:50
G01     65.2           31.9                4.5 +/-    1.16       7.5 +/-    1.16  0.060 / 0.050
G07     140.0          25.8                6.4 +/-    2.32      12.3 +/-    2.32  0.060 / 0.040
G11     50.9           27.0                2.8 +/-    2.87       5.3 +/-    2.87  0.060 / 0.110
G13     270.1          36.2                5.2 +/-    1.51       8.0 +/-    1.51  0.100 / 0.130
G15     298.0          16.4                4.3 +/-    1.30      10.3 +/-    1.30  0.030 / 0.040
G17     246.3          74.5                6.4 +/-    0.41       6.6 +/-    0.41  0.040 / 0.030
G19     228.5          48.0                5.1 +/-    1.90       6.6 +/-    1.90  0.110 / 0.270
G28     29.1           57.7                4.4 +/-    1.54       5.2 +/-    1.54  0.130 / 0.270
G30     139.5          56.1                7.4 +/-    0.31       8.7 +/-    0.31  0.050 / 0.070