PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/22-13:28:10
G02     41.9           47.9                6.0 +/-    0.78       7.7 +/-    0.78  0.020 / 0.020
G05     123.6          67.8                9.0 +/-    0.41       9.6 +/-    0.41  0.020 / 0.020
G06     57.5           13.3                3.0 +/-    1.91       7.7 +/-    1.91  0.030 / 0.040
G12     194.5          59.4                8.6 +/-    0.47       9.8 +/-    0.47  0.030 / 0.040
G20     200.5          33.3                8.8 +/-    1.46      14.4 +/-    1.46  0.120 / 0.100
G25     281.0          58.0               12.3 +/-    0.84      14.2 +/-    0.84  0.090 / 0.120
G29     316.1          39.1                3.8 +/-    1.10       5.7 +/-    1.10  0.070 / 0.180