PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-21:28:00
G02     205.1          41.4               12.3 +/-    1.70      17.5 +/-    1.70  0.070 / 0.120
G06     153.3          74.0                9.7 +/-    0.69      10.0 +/-    0.69  0.050 / 0.130
G12     309.6          17.8                8.7 +/-    2.04      20.3 +/-    2.04  0.060 / 0.070
G17     41.4           44.6                9.0 +/-    1.48      12.2 +/-    1.48  0.050 / 0.080
G19     14.0           61.2                8.6 +/-    0.69       9.7 +/-    0.69  0.050 / 0.070
G24     289.7          40.9                5.2 +/-    7.22       7.5 +/-    7.22  0.050 / 0.070
G28     105.9          31.2                8.1 +/-    1.22      13.9 +/-    1.22  0.200 / 0.180