PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-17:28:00
G07     41.1           67.9                8.7 +/-    0.40       9.4 +/-    0.40  0.040 / 0.040
G08     60.1           46.4                8.5 +/-    0.69      11.2 +/-    0.69  0.020 / 0.040
G09     180.4          48.6               12.8 +/-    1.73      16.5 +/-    1.73  0.050 / 0.090
G11     127.0          29.9               11.5 +/-    1.42      20.2 +/-    1.42  0.050 / 0.080
G18     110.7          11.5               10.6 +/-    2.53      28.7 +/-    2.53  0.070 / 0.180
G23     160.2          17.1                9.5 +/-    0.67      22.4 +/-    0.67  0.070 / 0.170
G27     40.2           16.8                7.6 +/-    1.85      18.0 +/-    1.85  0.100 / 0.200
G28     258.1          42.9               12.2 +/-    1.75      16.9 +/-    1.75  0.130 / 0.270
G30     324.1          54.1                9.9 +/-    1.16      11.9 +/-    1.16  0.090 / 0.420