PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/27-14:13:00
G02     37.0           52.0                4.8 +/-    0.95       6.0 +/-    0.95  0.040 / 0.040
G05     135.9          66.2                5.9 +/-    0.67       6.4 +/-    0.67  0.040 / 0.030
G06     57.4           10.9                4.6 +/-    1.90      12.5 +/-    1.90  0.040 / 0.050
G12     190.9          59.9                6.4 +/-    0.55       7.3 +/-    0.55  0.040 / 0.050
G25     280.0          59.4               -2.0 +/-    2.96      -2.3 +/-    2.96  0.030 / 0.030
G29     311.8          32.9                2.3 +/-    1.95       3.9 +/-    1.95  0.030 / 0.030