PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/22-12:28:00
G10     244.7          20.9                4.3 +/-    1.66       9.2 +/-    1.66  0.060 / 0.060
G13     61.7           34.2                2.9 +/-    0.91       4.7 +/-    0.91  0.040 / 0.070
G15     98.5           56.9                4.4 +/-    0.72       5.1 +/-    0.72  0.090 / 0.180
G16     305.2          14.0                3.0 +/-    2.58       7.7 +/-    2.58  0.100 / 0.190
G18     261.0          53.7                6.6 +/-    1.01       8.0 +/-    1.01  0.040 / 0.050
G20     33.0           59.2                3.9 +/-    0.62       4.5 +/-    0.62  0.040 / 0.050
G21     329.3          57.7                2.8 +/-    0.53       3.2 +/-    0.53  0.140 / 0.400
G26     275.9          18.0                5.3 +/-    1.43      12.2 +/-    1.43  0.120 / 0.380
G29     161.1          55.5                6.2 +/-    0.85       7.4 +/-    0.85  0.060 / 0.120