PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-23:43:00
G01     41.6           17.3                8.5 +/-    2.76      19.9 +/-    2.76  0.140 / 0.180
G06     178.3          33.5                9.7 +/-    1.25      15.9 +/-    1.25  0.260 / 0.290
G13     238.3          23.5               10.0 +/-    2.07      20.3 +/-    2.07  0.030 / 0.030
G15     271.8          12.8                8.0 +/-    1.60      20.9 +/-    1.60  0.030 / 0.030
G17     2.7            70.9                8.5 +/-    0.27       8.9 +/-    0.27  0.130 / 0.260
G19     271.3          68.1                9.5 +/-    0.58      10.2 +/-    0.58  0.290 / 0.150
G24     316.3          19.5                6.0 +/-    2.18      13.3 +/-    2.18  0.040 / 0.040
G28     65.3           50.4                8.3 +/-    0.78      10.4 +/-    0.78  0.040 / 0.050
G30     154.0          28.7               10.3 +/-    1.00      18.6 +/-    1.00  0.070 / 0.090