PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-07:42:40
G01     74.8           33.2                4.3 +/-    0.92       7.0 +/-    0.92  0.030 / 0.050
G07     135.3          33.2                8.1 +/-    0.78      13.3 +/-    0.78  0.040 / 0.040
G11     56.4           32.4                2.9 +/-    1.17       4.9 +/-    1.17  0.050 / 0.080
G13     280.7          37.1                3.5 +/-    1.76       5.4 +/-    1.76  0.050 / 0.070
G15     305.4          14.8               -0.0 +/-    1.94      -0.1 +/-    1.94  0.040 / 0.030
G17     228.5          67.6                6.5 +/-    0.79       6.9 +/-    0.79  0.030 / 0.020
G19     221.8          40.4                6.5 +/-    1.78       9.4 +/-    1.78  0.080 / 0.210
G28     14.7           59.8                2.8 +/-    0.54       3.2 +/-    0.54  0.090 / 0.210
G30     130.8          64.5                6.2 +/-    0.37       6.7 +/-    0.37  0.060 / 0.080