PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-00:27:50
G02     223.0          68.3               12.8 +/-    0.62      13.6 +/-    0.62  0.020 / 0.030
G06     46.3           67.9               11.5 +/-    0.50      12.3 +/-    0.50  0.030 / 0.030
G12     320.4          42.3               11.4 +/-    1.07      16.0 +/-    1.07  0.040 / 0.070
G17     60.7           31.7               10.5 +/-    2.67      17.8 +/-    2.67  0.040 / 0.040
G19     46.2           45.5               11.6 +/-    0.65      15.6 +/-    0.65  0.070 / 0.080
G24     256.5          39.5               12.7 +/-    2.11      18.6 +/-    2.11  0.050 / 0.100