PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-01:58:10
G02     46.5           43.6               10.2 +/-    0.94      14.0 +/-    0.94  0.040 / 0.050
G05     96.4           68.8               11.4 +/-    0.82      12.1 +/-    0.82  0.040 / 0.070
G12     188.7          51.1               13.3 +/-    0.69      16.6 +/-    0.69  0.050 / 0.040
G25     270.6          58.1               12.1 +/-    0.49      14.0 +/-    0.49  0.050 / 0.050
G29     316.9          38.7               10.6 +/-    0.88      15.8 +/-    0.88  0.040 / 0.080