PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-21:27:50
G02     205.1          41.4               12.5 +/-    1.30      17.7 +/-    1.30  0.060 / 0.140
G06     153.3          74.0               12.3 +/-    1.06      12.8 +/-    1.06  0.090 / 0.130
G12     309.6          17.8                8.4 +/-    1.52      19.5 +/-    1.52  0.060 / 0.090
G17     41.4           44.6                9.1 +/-    0.79      12.3 +/-    0.79  0.060 / 0.080
G19     14.0           61.2                9.6 +/-    1.02      10.8 +/-    1.02  0.050 / 0.070
G24     289.7          40.9                6.8 +/-    1.81       9.7 +/-    1.81  0.050 / 0.080
G28     105.9          31.2               10.7 +/-    1.03      18.4 +/-    1.03  0.090 / 0.170