PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-10:27:40
G02     53.7           36.9                3.5 +/-    1.19       5.4 +/-    1.19  0.030 / 0.020
G05     75.5           67.1                5.7 +/-    0.57       6.1 +/-    0.57  0.030 / 0.030
G12     188.6          43.8                7.7 +/-    0.73      10.5 +/-    0.73  0.050 / 0.050
G20     205.6          46.2                6.7 +/-    0.51       8.9 +/-    0.51  0.050 / 0.050
G21     265.3          15.0                2.1 +/-    1.61       5.2 +/-    1.61  0.050 / 0.070
G25     253.3          56.8                4.3 +/-    1.71       5.0 +/-    1.71  0.040 / 0.070
G29     324.4          48.8                3.5 +/-    0.79       4.5 +/-    0.79  0.120 / 0.430