PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-05:27:50
G02     44.5           45.3                3.5 +/-    1.64       4.7 +/-    1.64  0.040 / 0.040
G05     107.2          68.5                6.8 +/-    0.75       7.2 +/-    0.75  0.030 / 0.040
G12     192.1          56.2                6.1 +/-    0.36       7.1 +/-    0.36  0.100 / 0.210
G20     205.5          25.4                5.5 +/-    1.51      10.7 +/-    1.51  0.100 / 0.160
G25     278.4          57.6                5.7 +/-    1.05       6.6 +/-    1.05  0.030 / 0.030
G29     315.2          36.9                4.2 +/-    0.62       6.4 +/-    0.62  0.030 / 0.030