PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-01:12:10
G02     39.9           49.5                9.3 +/-    0.69      11.7 +/-    0.69  0.030 / 0.040
G05     120.2          67.1               11.3 +/-    0.50      12.1 +/-    0.50  0.030 / 0.050
G06     58.0           10.2                8.8 +/-    2.69      24.5 +/-    2.69  0.030 / 0.040
G12     191.9          59.7               12.1 +/-    0.95      13.8 +/-    0.95  0.030 / 0.100
G25     286.2          56.5               10.1 +/-    1.17      11.9 +/-    1.17  0.040 / 0.070
G29     311.7          32.4                9.5 +/-    1.21      15.9 +/-    1.21  0.050 / 0.080