PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-10:12:30
G02     203.3          37.4                7.9 +/-    0.88      12.0 +/-    0.88  0.050 / 0.100
G06     166.7          68.4                7.4 +/-    0.29       7.9 +/-    0.29  0.080 / 0.100
G12     308.4          15.5                1.7 +/-    2.88       4.3 +/-    2.88  0.080 / 0.070
G17     39.3           46.6                4.1 +/-    1.28       5.4 +/-    1.28  0.080 / 0.090
G19     8.8            63.3                4.3 +/-    0.61       4.8 +/-    0.61  0.080 / 0.240
G24     297.5          38.0                3.4 +/-    2.18       5.2 +/-    2.18  0.170 / 0.340
G28     104.8          29.3                6.9 +/-    0.99      12.3 +/-    0.99  0.030 / 0.030