PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/15-13:27:50
G01     69.7           32.8                6.3 +/-    0.96      10.4 +/-    0.96  0.030 / 0.030
G07     137.9          30.0                7.3 +/-    1.79      12.7 +/-    1.79  0.030 / 0.030
G11     52.3           29.1                6.2 +/-    1.36      11.1 +/-    1.36  0.060 / 0.090
G13     272.9          37.6                5.0 +/-    2.31       7.6 +/-    2.31  0.070 / 0.110
G15     304.8          13.7                2.3 +/-    1.87       5.9 +/-    1.87  0.040 / 0.110
G17     235.9          71.4                8.9 +/-    0.44       9.3 +/-    0.44  0.060 / 0.110
G18     47.8           17.3                6.5 +/-    2.26      15.2 +/-    2.26  0.060 / 0.080
G19     224.6          39.3                8.3 +/-    2.11      12.3 +/-    2.11  0.050 / 0.070
G28     20.8           59.1                8.5 +/-    1.60       9.7 +/-    1.60  0.130 / 0.160
G30     136.6          62.6                8.7 +/-    0.77       9.6 +/-    0.77  0.190 / 0.170