PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-10:42:40
G07     325.5          55.2                2.2 +/-    0.94       2.6 +/-    0.94  0.040 / 0.050
G08     108.9          48.5                4.1 +/-    0.88       5.3 +/-    0.88  0.040 / 0.050
G09     197.4          80.1                3.4 +/-    0.95       3.4 +/-    0.95  0.030 / 0.050
G16     44.1           15.6                1.4 +/-    1.51       3.5 +/-    1.51  0.040 / 0.070
G23     152.5          52.3                5.0 +/-    0.40       6.1 +/-    0.40  0.090 / 0.140
G27     62.7           34.4                2.1 +/-    0.72       3.4 +/-    0.72  0.090 / 0.140
G28     231.5          23.2                6.2 +/-    2.09      12.7 +/-    2.09  0.140 / 0.460
G30     294.3          28.0                3.4 +/-    1.67       6.2 +/-    1.67  0.110 / 0.440