PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-03:57:40
G02     203.8          41.1                6.8 +/-    2.15       9.7 +/-    2.15  0.090 / 0.140
G06     158.8          72.2                4.6 +/-    0.79       4.8 +/-    0.79  0.080 / 0.140
G12     309.6          17.4                3.0 +/-    1.67       6.9 +/-    1.67  0.040 / 0.050
G17     38.6           47.4                3.8 +/-    0.92       5.0 +/-    0.92  0.030 / 0.060
G19     10.7           62.4                4.0 +/-    0.97       4.4 +/-    0.97  0.030 / 0.040
G24     293.9          39.5                3.3 +/-    2.12       4.9 +/-    2.12  0.040 / 0.030
G28     106.9          27.7                5.1 +/-    1.52       9.4 +/-    1.52  0.100 / 0.130