PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-05:12:30
G02     235.4          75.6                4.6 +/-    0.41       4.8 +/-    0.41  0.150 / 0.190
G05     172.0          14.4                4.8 +/-    1.86      12.1 +/-    1.86  0.120 / 0.170
G06     41.4           63.8                3.3 +/-    0.67       3.6 +/-    0.67  0.060 / 0.100
G12     321.1          47.6                2.9 +/-    0.45       3.8 +/-    0.45  0.050 / 0.100
G17     68.0           25.4                4.3 +/-    1.83       8.4 +/-    1.83  0.020 / 0.030
G19     54.6           40.2                3.9 +/-    1.43       5.7 +/-    1.43  0.040 / 0.030
G24     249.4          36.4                5.7 +/-    1.60       8.7 +/-    1.60  0.040 / 0.050