PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/29-09:58:10
G02     66.5           26.0                4.2 +/-    1.67       8.0 +/-    1.67  0.040 / 0.110
G05     50.4           53.9                3.2 +/-    0.39       3.8 +/-    0.39  0.040 / 0.100
G12     184.8          26.5                7.7 +/-    0.58      14.6 +/-    0.58  0.020 / 0.040
G13     123.5          19.9                7.8 +/-    1.22      17.1 +/-    1.22  0.030 / 0.040
G15     158.6          18.4                6.5 +/-    0.96      14.8 +/-    0.96  0.070 / 0.110
G20     215.1          62.9                8.3 +/-    0.58       9.2 +/-    0.58  0.070 / 0.120
G21     278.2          24.2                4.9 +/-    1.70       9.8 +/-    1.70  0.050 / 0.060
G25     228.5          46.6                7.1 +/-    2.07       9.3 +/-    2.07  0.060 / 0.070
G29     335.3          63.6                5.0 +/-    0.40       5.6 +/-    0.40  0.040 / 0.050