PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/28-02:13:00
G02     202.9          35.3                9.9 +/-    1.19      15.6 +/-    1.19  0.060 / 0.070
G06     171.4          64.7                7.9 +/-    0.62       8.7 +/-    0.62  0.070 / 0.090
G12     306.4          13.1                4.9 +/-    1.60      12.8 +/-    1.60  0.050 / 0.030
G17     37.6           47.5                6.0 +/-    2.06       7.8 +/-    2.06  0.040 / 0.030
G19     359.3          65.6                6.0 +/-    0.76       6.5 +/-    0.76  0.140 / 0.230
G24     295.6          39.7                7.4 +/-    6.51      10.8 +/-    6.51  0.210 / 0.260
G28     100.5          34.2                7.8 +/-    1.12      12.6 +/-    1.12  0.060 / 0.100