PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-09:58:00
G02     60.4           31.1                4.7 +/-    1.83       8.1 +/-    1.83  0.030 / 0.040
G05     58.5           60.9                5.0 +/-    0.35       5.7 +/-    0.35  0.030 / 0.030
G12     186.5          34.6                5.8 +/-    1.21       9.3 +/-    1.21  0.070 / 0.090
G13     129.6          14.7                5.2 +/-    2.67      13.1 +/-    2.67  0.060 / 0.080
G15     162.8          12.3                4.9 +/-    2.98      13.0 +/-    2.98  0.040 / 0.050
G20     209.8          54.7                6.9 +/-    0.38       8.2 +/-    0.38  0.030 / 0.040
G21     271.9          19.7                4.8 +/-    2.43      10.6 +/-    2.43  0.090 / 0.090
G25     238.7          52.3                5.2 +/-    2.40       6.4 +/-    2.40  0.090 / 0.080
G29     329.8          56.2                3.4 +/-    0.33       3.9 +/-    0.33  0.090 / 0.340