PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-12:12:30
G07     326.3          55.5                2.3 +/-    0.83       2.7 +/-    0.83  0.030 / 0.060
G08     108.9          48.5                4.0 +/-    0.96       5.2 +/-    0.96  0.040 / 0.070
G09     203.5          80.7                1.6 +/-    1.02       1.6 +/-    1.02  0.090 / 0.130
G16     44.2           14.9                2.5 +/-    1.07       6.2 +/-    1.07  0.090 / 0.130
G23     152.3          52.0                4.0 +/-    0.99       5.0 +/-    0.99  0.120 / 0.360
G27     62.7           34.4                2.2 +/-    1.04       3.5 +/-    1.04  0.110 / 0.300
G28     231.5          23.1                4.9 +/-    1.51      10.0 +/-    1.51  0.050 / 0.070
G30     294.1          27.7                3.9 +/-    1.56       7.2 +/-    1.56  0.050 / 0.080