PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-06:27:50
G01     111.5          23.0                6.1 +/-    1.49      12.5 +/-    1.49  0.060 / 0.040
G07     99.5           60.7                6.0 +/-    0.80       6.8 +/-    0.80  0.030 / 0.030
G08     42.5           23.5               13.1 +/-    2.01      26.5 +/-    2.01  0.030 / 0.030
G09     175.7          18.0                4.6 +/-    1.07      10.6 +/-    1.07  0.030 / 0.030
G11     95.5           41.5                6.9 +/-    0.96       9.8 +/-    0.96  0.070 / 0.100
G13     313.9          24.2                2.6 +/-    1.42       5.2 +/-    1.42  0.060 / 0.120
G17     203.7          34.6                6.1 +/-    0.94       9.7 +/-    0.94  0.060 / 0.080
G28     310.0          60.2                3.5 +/-    1.14       3.9 +/-    1.14  0.060 / 0.070
G30     8.8            75.2                5.1 +/-    0.46       5.3 +/-    0.46  0.110 / 0.180