PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-08:28:10
G02     224.0          70.0                5.0 +/-    0.74       5.3 +/-    0.74  0.040 / 0.050
G06     46.6           72.8                3.9 +/-    0.47       4.1 +/-    0.47  0.050 / 0.050
G12     320.3          41.7                4.3 +/-    0.69       6.1 +/-    0.69  0.040 / 0.030
G17     64.4           27.1                1.3 +/-    1.12       2.5 +/-    1.12  0.040 / 0.030
G19     49.4           43.2                3.3 +/-    1.27       4.6 +/-    1.27  0.050 / 0.070
G24     256.8          39.1                5.6 +/-    2.68       8.3 +/-    2.68  0.070 / 0.090