PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-08:43:00
G02     64.2           27.8                1.4 +/-    1.07       2.6 +/-    1.07  0.030 / 0.040
G05     52.6           56.2                3.1 +/-    0.67       3.7 +/-    0.67  0.030 / 0.040
G12     185.3          29.4                5.6 +/-    2.59       9.9 +/-    2.59  0.080 / 0.210
G13     125.7          18.0                7.2 +/-    1.31      16.6 +/-    1.31  0.080 / 0.180
G15     160.2          16.1                6.2 +/-    2.60      15.0 +/-    2.60  0.070 / 0.070
G20     213.3          58.9                6.5 +/-    0.98       7.4 +/-    0.98  0.050 / 0.070
G21     275.5          21.8                2.8 +/-    1.52       6.0 +/-    1.52  0.090 / 0.170
G25     232.2          48.9                6.8 +/-    1.11       8.7 +/-    1.11  0.140 / 0.120
G29     332.5          60.1                3.5 +/-    1.19       4.0 +/-    1.19  0.160 / 0.490