PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/23-13:27:50
G02     43.0           46.8                4.0 +/-    0.58       5.2 +/-    0.58  0.020 / 0.020
G05     119.6          68.5                5.6 +/-    0.92       5.9 +/-    0.92  0.020 / 0.020
G06     58.4           12.4                2.2 +/-    0.95       5.7 +/-    0.95  0.080 / 0.110
G12     193.7          57.9                7.6 +/-    0.46       8.7 +/-    0.46  0.070 / 0.100
G20     200.8          34.7                7.1 +/-    2.39      11.4 +/-    2.39  0.030 / 0.040
G25     278.2          58.3               11.5 +/-    0.67      13.2 +/-    0.67  0.030 / 0.030
G29     317.0          40.1                4.1 +/-    0.98       5.9 +/-    0.98  0.040 / 0.040