PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-10:42:40
G02     73.2           20.5                4.5 +/-    0.72       9.8 +/-    0.72  0.020 / 0.050
G05     46.1           45.7                3.0 +/-    0.40       4.0 +/-    0.40  0.030 / 0.050
G12     182.9          18.1                4.3 +/-    3.53      10.0 +/-    3.53  0.040 / 0.030
G13     115.8          25.5                5.6 +/-    1.65      10.8 +/-    1.65  0.050 / 0.040
G15     153.5          25.7                7.4 +/-    1.10      14.2 +/-    1.10  0.060 / 0.160
G18     223.3          16.9                2.1 +/-    0.84       5.0 +/-    0.84  0.070 / 0.150
G20     224.9          72.4                5.2 +/-    0.70       5.5 +/-    0.70  0.060 / 0.190
G21     285.6          29.6                3.8 +/-    1.29       6.6 +/-    1.29  0.110 / 0.240
G25     219.9          39.2                5.3 +/-    1.84       7.8 +/-    1.84  0.050 / 0.150
G29     343.7          72.6                4.6 +/-    0.68       4.8 +/-    0.68  0.050 / 0.130