PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-12:57:30
G02     55.8           35.2                3.6 +/-    1.20       5.7 +/-    1.20  0.030 / 0.020
G05     70.1           66.3                4.7 +/-    0.25       5.1 +/-    0.25  0.030 / 0.020
G12     187.8          40.4                5.3 +/-    0.85       7.7 +/-    0.85  0.050 / 0.060
G13     134.0          11.0                3.7 +/-   13.78      10.1 +/-   13.78  0.050 / 0.060
G20     206.1          50.9                7.7 +/-    0.72       9.6 +/-    0.72  0.040 / 0.050
G21     268.1          18.0                5.5 +/-    2.32      12.8 +/-    2.32  0.030 / 0.040
G25     246.3          55.5                5.1 +/-    1.16       6.0 +/-    1.16  0.050 / 0.050
G29     327.7          53.0                1.5 +/-    1.17       1.8 +/-    1.17  0.040 / 0.040