PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-13:57:50
G02     73.9           20.2                4.0 +/-    2.27       8.7 +/-    2.27  0.040 / 0.030
G05     45.9           46.0                2.1 +/-    0.56       2.8 +/-    0.56  0.030 / 0.030
G12     182.6          16.9                4.9 +/-    1.19      11.5 +/-    1.19  0.110 / 0.280
G13     115.1          26.3                5.1 +/-    2.11       9.8 +/-    2.11  0.110 / 0.260
G15     153.0          26.6                7.3 +/-    2.40      13.8 +/-    2.40  0.040 / 0.030
G18     223.9          17.2                3.9 +/-    4.62       9.3 +/-    4.62  0.040 / 0.030
G20     226.7          75.9                4.9 +/-    0.46       5.0 +/-    0.46  0.080 / 0.080
G21     287.5          31.8                2.3 +/-    2.70       3.9 +/-    2.70  0.070 / 0.090
G25     217.9          37.7                5.6 +/-    2.02       8.5 +/-    2.02  0.080 / 0.160
G29     350.5          75.8                3.5 +/-    0.75       3.5 +/-    0.75  0.100 / 0.120