PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/06-01:57:40
G02     228.8          72.3               10.6 +/-    0.50      11.0 +/-    0.50  0.030 / 0.030
G05     173.0          12.1                8.3 +/-    2.69      22.1 +/-    2.69  0.030 / 0.030
G06     43.2           64.9                7.6 +/-    0.63       8.3 +/-    0.63  0.030 / 0.040
G12     320.9          45.4                9.1 +/-    0.71      12.2 +/-    0.71  0.030 / 0.050
G17     64.1           29.3                7.7 +/-    1.20      13.7 +/-    1.20  0.050 / 0.070
G19     50.6           42.8                8.0 +/-    1.38      11.1 +/-    1.38  0.070 / 0.090
G24     252.3          37.9               11.0 +/-    1.16      16.6 +/-    1.16  0.210 / 0.320