PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-08:42:40
G02     59.9           31.4                2.3 +/-    0.68       3.9 +/-    0.68  0.050 / 0.050
G05     59.0           61.0                3.2 +/-    0.56       3.6 +/-    0.56  0.040 / 0.050
G12     186.5          35.1                5.3 +/-    0.65       8.4 +/-    0.65  0.030 / 0.040
G13     130.0          14.3                5.3 +/-    4.10      13.3 +/-    4.10  0.020 / 0.030
G15     163.2          11.8                4.2 +/-    2.03      11.3 +/-    2.03  0.100 / 0.240
G20     209.8          53.2                6.8 +/-    1.45       8.3 +/-    1.45  0.110 / 0.200
G21     271.1          18.6                3.0 +/-    1.90       6.9 +/-    1.90  0.130 / 0.410
G25     240.0          52.7                5.4 +/-    0.78       6.6 +/-    0.78  0.130 / 0.470
G29     328.8          55.0                1.5 +/-    0.80       1.7 +/-    0.80  0.050 / 0.100