PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-03:58:10
G02     204.0          41.5                6.1 +/-    0.49       8.7 +/-    0.49  0.080 / 0.140
G06     157.9          72.7                5.5 +/-    0.39       5.7 +/-    0.39  0.080 / 0.120
G12     309.8          17.7                4.1 +/-    2.65       9.6 +/-    2.65  0.030 / 0.040
G17     39.0           47.1                1.8 +/-    2.05       2.4 +/-    2.05  0.070 / 0.050
G19     11.6           62.1                2.5 +/-    0.68       2.8 +/-    0.68  0.030 / 0.020
G24     293.4          39.6                7.4 +/-    5.62      10.8 +/-    5.62  0.030 / 0.030
G28     107.3          27.4                6.2 +/-    1.62      11.5 +/-    1.62  0.210 / 0.210