PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-17:43:00
G08     302.1          21.4                6.3 +/-    1.29      13.3 +/-    1.29  0.060 / 0.110
G10     347.4          61.9                7.8 +/-    0.46       8.7 +/-    0.46  0.060 / 0.080
G14     223.4          38.7                9.3 +/-    0.89      13.8 +/-    0.89  0.040 / 0.080
G18     54.1           54.2                8.5 +/-    0.43      10.2 +/-    0.43  0.040 / 0.070
G21     140.5          43.3               12.3 +/-    1.29      17.0 +/-    1.29  0.050 / 0.070
G24     65.7           29.3                9.6 +/-    0.65      17.1 +/-    0.65  0.050 / 0.090
G27     262.6          35.3                7.7 +/-    0.76      12.1 +/-    0.76  0.030 / 0.040
G32     232.3          59.4                9.8 +/-    0.67      11.2 +/-    0.67  0.030 / 0.040