PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-23:27:50
G02     205.2          42.4               13.2 +/-    1.53      18.5 +/-    1.53  0.060 / 0.070
G06     156.8          73.8               11.8 +/-    0.77      12.2 +/-    0.77  0.050 / 0.070
G12     309.9          18.1                9.1 +/-    2.28      20.9 +/-    2.28  0.070 / 0.160
G17     42.7           43.4                8.8 +/-    1.81      12.1 +/-    1.81  0.100 / 0.160
G19     14.2           61.0                9.6 +/-    0.77      10.8 +/-    0.77  0.050 / 0.030
G24     288.3          41.5               14.8 +/-    2.74      21.0 +/-    2.74  0.050 / 0.040
G28     106.7          30.3               12.4 +/-    0.67      21.6 +/-    0.67  0.040 / 0.020