PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/14-13:42:20
G02     34.6           54.5                5.2 +/-    0.39       6.2 +/-    0.39  0.050 / 0.040
G05     142.5          61.6                7.7 +/-    1.28       8.7 +/-    1.28  0.030 / 0.030
G06     52.9           19.0                2.9 +/-    1.55       6.6 +/-    1.55  0.020 / 0.040
G12     202.8          68.5                3.3 +/-    0.65       3.6 +/-    0.65  0.030 / 0.040
G20     199.1          25.2                4.6 +/-    1.36       9.0 +/-    1.36  0.100 / 0.220
G25     295.7          54.4                4.7 +/-    0.66       5.6 +/-    0.66  0.100 / 0.190
G29     310.3          33.0                3.0 +/-    1.30       4.9 +/-    1.30  0.050 / 0.060