PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-21:57:20
G02     212.2          55.6               12.0 +/-    0.85      14.2 +/-    0.85  0.090 / 0.220
G06     83.8           79.7               10.7 +/-    0.75      10.8 +/-    0.75  0.080 / 0.190
G12     315.7          29.0                7.4 +/-    2.15      13.2 +/-    2.15  0.050 / 0.090
G17     52.9           35.4                9.1 +/-    0.81      14.3 +/-    0.81  0.050 / 0.090
G19     33.6           52.0                9.3 +/-    0.67      11.4 +/-    0.67  0.060 / 0.070
G24     271.1          42.4                7.7 +/-    1.12      10.8 +/-    1.12  0.050 / 0.070
G28     117.5          21.6               11.6 +/-    2.33      24.6 +/-    2.33  0.100 / 0.140