PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-11:57:30
G02     46.3           43.7                4.7 +/-    1.50       6.5 +/-    1.50  0.030 / 0.020
G05     105.4          69.5                5.6 +/-    0.68       5.9 +/-    0.68  0.030 / 0.020
G06     60.1           11.1                3.0 +/-    1.90       8.3 +/-    1.90  0.040 / 0.040
G12     191.9          53.9                7.5 +/-    0.93       9.0 +/-    0.93  0.040 / 0.050
G20     202.1          37.6                6.9 +/-    1.01      10.5 +/-    1.01  0.060 / 0.110
G25     271.5          58.4                0.6 +/-    2.41       0.7 +/-    2.41  0.070 / 0.090
G29     318.9          42.1                5.4 +/-    1.28       7.6 +/-    1.28  0.250 / 0.170