PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-07:42:50
G02     204.9          38.9                8.4 +/-    0.54      12.5 +/-    0.54  0.080 / 0.120
G06     155.3          72.9                8.2 +/-    0.42       8.6 +/-    0.42  0.080 / 0.140
G12     309.6          18.5                4.6 +/-    2.68      10.5 +/-    2.68  0.040 / 0.020
G17     42.3           43.5                5.4 +/-    2.09       7.4 +/-    2.09  0.030 / 0.020
G19     5.3            63.6                5.2 +/-    0.54       5.7 +/-    0.54  0.100 / 0.130
G24     287.5          42.9                2.5 +/-    2.89       3.5 +/-    2.89  0.120 / 0.130
G28     105.8          29.9                8.5 +/-    0.96      14.9 +/-    0.96  0.050 / 0.050