PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-17:42:40
G07     38.9           67.9               12.6 +/-    0.59      13.5 +/-    0.59  0.040 / 0.050
G08     60.7           46.6               11.7 +/-    0.88      15.5 +/-    0.88  0.050 / 0.050
G09     180.5          49.2               15.0 +/-    0.78      19.1 +/-    0.78  0.210 / 0.390
G11     127.5          29.5               16.3 +/-    1.36      28.9 +/-    1.36  0.160 / 0.330
G18     111.2          11.2               13.9 +/-    3.12      37.9 +/-    3.12  0.100 / 0.210
G23     160.2          17.9               14.4 +/-    1.42      33.3 +/-    1.42  0.110 / 0.180
G27     40.5           17.3                8.9 +/-    2.58      21.0 +/-    2.58  0.180 / 0.220
G28     257.4          42.5               16.3 +/-    1.46      22.8 +/-    1.46  0.260 / 0.240
G30     323.3          53.5               12.2 +/-    0.44      14.7 +/-    0.44  0.040 / 0.050