PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-07:57:50
G01     64.5           31.8                3.5 +/-    0.48       6.0 +/-    0.48  0.060 / 0.050
G07     140.3          25.1                6.5 +/-    1.31      12.7 +/-    1.31  0.040 / 0.050
G11     50.4           26.3                3.4 +/-    1.51       6.4 +/-    1.51  0.050 / 0.110
G13     269.4          36.1                6.6 +/-    0.88      10.2 +/-    0.88  0.060 / 0.110
G15     297.5          16.4                3.1 +/-    1.63       7.4 +/-    1.63  0.120 / 0.250
G17     248.5          75.2                5.1 +/-    0.78       5.3 +/-    0.78  0.080 / 0.210
G19     229.1          48.6                2.8 +/-    1.05       3.6 +/-    1.05  0.030 / 0.030
G28     30.1           57.5                1.8 +/-    0.89       2.1 +/-    0.89  0.020 / 0.030
G30     140.1          55.8                6.5 +/-    1.18       7.7 +/-    1.18  0.060 / 0.080