PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/30-10:12:40
G02     47.1           43.0                4.3 +/-    0.43       5.9 +/-    0.43  0.100 / 0.520
G05     97.9           70.0                3.0 +/-    0.50       3.2 +/-    0.50  0.130 / 0.520
G12     189.3          50.6                6.1 +/-    1.87       7.6 +/-    1.87  0.040 / 0.050
G21     260.8          11.0               -1.3 +/-   11.73      -3.7 +/-   11.73  0.040 / 0.050
G25     254.6          60.0                5.3 +/-    0.69       6.0 +/-    0.69  0.050 / 0.050
G29     319.7          42.7                4.3 +/-    1.51       6.0 +/-    1.51  0.050 / 0.040