PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/23-12:27:40
G02     16.7           68.4                3.6 +/-    0.56       3.9 +/-    0.56  0.030 / 0.040
G05     159.2          45.1                6.0 +/-    0.99       8.1 +/-    0.99  0.030 / 0.040
G06     44.6           33.4                2.6 +/-    0.95       4.2 +/-    0.95  0.130 / 0.300
G12     271.4          78.7                5.3 +/-    1.65       5.4 +/-    1.65  0.210 / 0.320
G19     86.9           18.8                3.5 +/-    2.11       8.0 +/-    2.11  0.020 / 0.020
G24     220.8          14.7                5.6 +/-    2.09      14.0 +/-    2.09  0.020 / 0.020
G25     313.0          40.8                4.2 +/-    0.96       6.1 +/-    0.96  0.050 / 0.070
G29     297.5          20.6                4.3 +/-    1.05       9.4 +/-    1.05  0.050 / 0.070