PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/28-11:57:30
G08     297.0          23.2                5.8 +/-    0.98      11.7 +/-    0.98  0.040 / 0.060
G10     358.8          62.6                3.8 +/-    0.92       4.2 +/-    0.92  0.040 / 0.060
G14     225.5          43.0                8.6 +/-    1.76      12.0 +/-    1.76  0.130 / 0.110
G20     58.5           54.6                3.8 +/-    0.92       4.6 +/-    0.92  0.100 / 0.120
G21     143.3          41.0                5.9 +/-    0.63       8.4 +/-    0.63  0.030 / 0.020
G24     58.8           26.0                3.2 +/-    1.71       6.0 +/-    1.71  0.030 / 0.020
G27     262.6          34.0                6.9 +/-    1.88      11.2 +/-    1.88  0.080 / 0.030
G32     235.5          59.8                7.2 +/-    1.68       8.2 +/-    1.68  0.100 / 0.030