PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-07:57:50
G07     48.0           69.2                6.8 +/-    1.15       7.2 +/-    1.15  0.030 / 0.030
G08     54.9           44.2                5.3 +/-    0.76       7.2 +/-    0.76  0.030 / 0.020
G09     177.5          39.1                8.2 +/-    0.59      12.2 +/-    0.59  0.090 / 0.410
G11     123.4          34.3                8.4 +/-    0.92      13.6 +/-    0.92  0.070 / 0.310
G18     106.0          15.0                6.5 +/-    1.45      16.1 +/-    1.45  0.050 / 0.070
G27     37.6           10.1                1.9 +/-    5.22       5.3 +/-    5.22  0.060 / 0.070
G28     264.5          45.0                7.8 +/-    3.29      10.5 +/-    3.29  0.100 / 0.350
G30     327.0          56.7                5.9 +/-    1.05       6.9 +/-    1.05  0.110 / 0.320