PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/08-11:27:50
G01     81.8           33.1                5.1 +/-    0.75       8.3 +/-    0.75  0.060 / 0.070
G07     131.5          38.7                7.1 +/-    0.58      10.6 +/-    0.58  0.050 / 0.080
G11     60.1           35.6                3.2 +/-    0.42       5.0 +/-    0.42  0.040 / 0.030
G13     285.7          37.8                5.3 +/-    1.14       8.0 +/-    1.14  0.030 / 0.040
G17     220.6          62.0                7.1 +/-    0.63       7.9 +/-    0.63  0.060 / 0.100
G18     55.8           21.3                1.7 +/-    0.88       3.6 +/-    0.88  0.050 / 0.110
G19     218.3          29.2                5.8 +/-    1.68      10.4 +/-    1.68  0.080 / 0.190
G28     1.1            61.2                5.2 +/-    0.49       5.8 +/-    0.49  0.080 / 0.210
G30     121.7          72.0                7.6 +/-    0.93       7.9 +/-    0.93  0.060 / 0.130