PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-21:13:10
G02     203.0          34.8               16.5 +/-    1.75      26.2 +/-    1.75  0.060 / 0.120
G06     163.8          67.5               11.4 +/-    0.85      12.2 +/-    0.85  0.070 / 0.120
G12     306.2          12.9                7.4 +/-    2.01      19.4 +/-    2.01  0.090 / 0.100
G17     35.7           49.2                8.8 +/-    0.63      11.2 +/-    0.63  0.070 / 0.090
G19     2.0            65.2                8.8 +/-    0.69       9.6 +/-    0.69  0.060 / 0.120
G24     297.2          38.4                8.7 +/-    1.43      13.0 +/-    1.43  0.060 / 0.090
G28     99.7           35.4                9.0 +/-    1.07      14.1 +/-    1.07  0.120 / 0.270