PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-01:57:30
G02     222.9          68.8               12.0 +/-    1.22      12.8 +/-    1.22  0.050 / 0.070
G06     46.5           68.7                8.2 +/-    1.07       8.8 +/-    1.07  0.050 / 0.060
G12     320.2          41.7                9.1 +/-    1.12      12.9 +/-    1.12  0.040 / 0.040
G17     60.9           31.4                7.7 +/-    0.80      13.1 +/-    0.80  0.040 / 0.040
G19     46.7           45.2                8.3 +/-    0.71      11.1 +/-    0.71  0.050 / 0.100
G24     256.9          39.5               12.6 +/-    1.41      18.5 +/-    1.41  0.060 / 0.110