PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-08:42:40
G08     115.5          46.2                9.3 +/-    1.04      12.3 +/-    1.04  0.040 / 0.060
G09     227.9          83.7                6.8 +/-    0.54       6.8 +/-    0.54  0.040 / 0.060
G16     42.9           20.3                2.7 +/-    2.23       5.9 +/-    2.23  0.050 / 0.080
G23     150.2          57.2                9.3 +/-    0.91      10.9 +/-    0.91  0.050 / 0.080
G27     67.8           35.7                4.2 +/-    0.45       6.6 +/-    0.45  0.030 / 0.030
G28     228.7          19.7                8.1 +/-    4.18      17.9 +/-    4.18  0.030 / 0.030
G30     291.1          25.7                6.9 +/-    1.33      13.3 +/-    1.33  0.090 / 0.190