PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-11:57:50
G02     34.1           55.0                4.2 +/-    0.93       5.0 +/-    0.93  0.030 / 0.020
G05     142.3          61.0                6.1 +/-    0.73       6.9 +/-    0.73  0.030 / 0.020
G06     51.8           21.3                3.3 +/-    3.41       7.1 +/-    3.41  0.030 / 0.030
G12     205.3          69.9                5.9 +/-    0.65       6.2 +/-    0.65  0.030 / 0.050
G20     199.3          23.2                6.5 +/-    2.66      13.2 +/-    2.66  0.390 / 0.230
G25     298.2          53.1                3.8 +/-    1.85       4.6 +/-    1.85  0.170 / 0.260
G29     308.7          31.0                3.4 +/-    1.10       5.8 +/-    1.10  0.050 / 0.060