PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-08:13:00
G01     38.9           12.7                1.9 +/-    1.32       5.0 +/-    1.32  0.080 / 0.190
G02     200.0          11.3                0.8 +/-    9.41       2.2 +/-    9.41  0.110 / 0.210
G06     174.0          43.9                7.5 +/-    1.09      10.2 +/-    1.09  0.030 / 0.030
G13     233.2          19.0                6.1 +/-    1.53      13.9 +/-    1.53  0.040 / 0.030
G15     268.9          10.2                3.2 +/-    4.30       8.9 +/-    4.30  0.100 / 0.340
G17     15.2           64.8                5.0 +/-    0.49       5.5 +/-    0.49  0.100 / 0.290
G19     284.9          68.9                4.9 +/-    0.62       5.2 +/-    0.62  0.060 / 0.080
G24     312.9          26.8                4.8 +/-    1.85       9.1 +/-    1.85  0.050 / 0.070
G28     76.1           45.8                5.6 +/-    0.53       7.5 +/-    0.53  0.080 / 0.150
G30     156.3          24.3                5.6 +/-    2.07      11.2 +/-    2.07  0.100 / 0.150