PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/14-12:42:50
G02     204.7          39.5                8.1 +/-    1.38      11.9 +/-    1.38  0.070 / 0.090
G06     157.3          72.9                6.6 +/-    0.80       6.9 +/-    0.80  0.090 / 0.080
G12     310.2          18.3                6.2 +/-    1.28      14.1 +/-    1.28  0.090 / 0.180
G17     42.5           43.8                4.1 +/-    0.42       5.6 +/-    0.42  0.100 / 0.200
G19     15.0           61.1                4.9 +/-    0.41       5.5 +/-    0.41  0.120 / 0.160
G24     294.2          39.2                6.1 +/-    1.22       8.9 +/-    1.22  0.110 / 0.150
G28     107.6          27.3                5.6 +/-    1.66      10.4 +/-    1.66  0.030 / 0.060