PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/29-11:27:50
G05     48.4           17.5                2.8 +/-    0.96       6.7 +/-    0.96  0.070 / 0.130
G13     79.1           37.0                6.1 +/-    1.06       9.4 +/-    1.06  0.080 / 0.130
G15     124.1          51.3                7.9 +/-    0.76       9.9 +/-    0.76  0.230 / 0.250
G16     317.4          10.5               -4.7 +/-    9.90     -13.1 +/-    9.90  0.190 / 0.350
G20     16.2           72.5                5.8 +/-    0.46       6.0 +/-    0.46  0.180 / 0.300
G21     313.8          48.3                4.1 +/-    1.10       5.3 +/-    1.10  0.050 / 0.060
G25     200.8          12.4                4.7 +/-    1.74      12.4 +/-    1.74  0.040 / 0.070
G26     290.0          20.3                5.5 +/-    1.11      12.0 +/-    1.11  0.040 / 0.030
G29     152.5          71.9                7.9 +/-    0.49       8.2 +/-    0.49  0.040 / 0.040