PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-13:27:50
G10     253.2          28.2                4.2 +/-    1.40       7.6 +/-    1.40  0.050 / 0.050
G13     51.5           29.0                4.2 +/-    1.03       7.5 +/-    1.03  0.060 / 0.050
G15     77.9           55.5                7.4 +/-    0.61       8.8 +/-    0.61  0.120 / 0.270
G16     295.5          14.2                3.2 +/-    1.86       8.2 +/-    1.86  0.110 / 0.190
G18     277.0          59.9                6.1 +/-    1.05       7.0 +/-    1.05  0.060 / 0.040
G20     41.8           49.8                3.8 +/-    0.63       4.9 +/-    0.63  0.070 / 0.050
G21     344.4          65.0                2.4 +/-    1.01       2.6 +/-    1.01  0.060 / 0.130
G26     266.2          14.3                2.7 +/-    1.52       6.8 +/-    1.52  0.060 / 0.150
G29     164.2          43.5                9.8 +/-    0.66      13.5 +/-    0.66  0.100 / 0.280