PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-17:57:40
G02     49.5           42.3                9.9 +/-    0.67      13.9 +/-    0.67  0.030 / 0.020
G05     80.9           69.4               10.9 +/-    0.40      11.6 +/-    0.40  0.020 / 0.020
G12     183.7          39.6               14.5 +/-    1.10      21.2 +/-    1.10  0.040 / 0.060
G21     264.4          11.6                7.1 +/-   26.07      19.2 +/-   26.07  0.050 / 0.060
G25     248.3          57.0               12.2 +/-    1.15      14.3 +/-    1.15  0.050 / 0.040
G29     322.1          45.5               10.3 +/-    0.66      13.8 +/-    0.66  0.050 / 0.040