PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-04:28:00
G10     250.8          28.1                8.9 +/-    1.92      16.2 +/-    1.92  0.060 / 0.120
G13     52.9           28.9                4.5 +/-    1.01       8.1 +/-    1.01  0.070 / 0.120
G15     83.6           56.7                6.3 +/-    0.63       7.4 +/-    0.63  0.040 / 0.050
G16     298.6          14.5                5.5 +/-    2.43      13.9 +/-    2.43  0.030 / 0.050
G20     270.5          51.1                6.6 +/-    1.03       8.2 +/-    1.03  0.080 / 0.290
G21     336.3          61.0                6.2 +/-    0.32       6.9 +/-    0.32  0.090 / 0.230
G26     270.1          15.2                9.2 +/-    1.81      22.8 +/-    1.81  0.070 / 0.160
G29     161.9          46.3                7.1 +/-    0.78       9.4 +/-    0.78  0.060 / 0.160