PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/30-14:27:50
G02     27.2           60.8                8.6 +/-    0.47       9.7 +/-    0.47  0.030 / 0.040
G05     153.0          54.4               10.9 +/-    1.01      13.1 +/-    1.01  0.030 / 0.030
G06     49.4           24.0                6.0 +/-    1.29      12.1 +/-    1.29  0.030 / 0.030
G12     218.9          75.4                8.7 +/-    0.89       9.0 +/-    0.89  0.020 / 0.030
G19     95.1           12.8                8.6 +/-    1.74      22.6 +/-    1.74  0.140 / 0.290
G20     198.2          18.6               10.7 +/-    1.40      24.3 +/-    1.40  0.140 / 0.390
G25     304.9          49.7                8.7 +/-    0.81      11.0 +/-    0.81  0.080 / 0.060
G29     305.2          28.1                6.7 +/-    1.54      12.2 +/-    1.54  0.050 / 0.060