PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-17:43:00
G07     0.2            65.0               10.9 +/-    0.97      11.9 +/-    0.97  0.030 / 0.030
G08     83.0           52.0               10.0 +/-    0.70      12.4 +/-    0.70  0.030 / 0.040
G09     185.6          65.8               10.4 +/-    0.63      11.3 +/-    0.63  0.030 / 0.030
G11     139.0          19.6               12.4 +/-    3.12      27.6 +/-    3.12  0.030 / 0.030
G23     158.0          33.2               10.6 +/-    0.78      17.4 +/-    0.78  0.060 / 0.140
G27     49.2           28.2                8.8 +/-    2.14      16.0 +/-    2.14  0.120 / 0.100
G28     242.6          31.9               12.0 +/-    2.28      20.2 +/-    2.28  0.080 / 0.130
G30     309.7          42.2                9.8 +/-    1.80      13.8 +/-    1.80  0.110 / 0.160