PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-11:12:50
G01     69.5           32.8                4.6 +/-    1.00       7.7 +/-    1.00  0.030 / 0.040
G07     138.0          29.3                4.7 +/-    1.23       8.4 +/-    1.23  0.030 / 0.030
G11     52.1           29.0                3.2 +/-    1.22       5.7 +/-    1.22  0.060 / 0.120
G13     272.6          37.6                5.3 +/-    0.94       8.0 +/-    0.94  0.050 / 0.130
G15     306.2          12.8                1.4 +/-    1.47       3.8 +/-    1.47  0.050 / 0.070
G17     236.5          71.8                6.9 +/-    0.66       7.2 +/-    0.66  0.050 / 0.080
G18     47.1           16.7                1.9 +/-    0.81       4.5 +/-    0.81  0.050 / 0.110
G19     224.7          38.4                7.1 +/-    1.95      10.7 +/-    1.95  0.060 / 0.100
G28     19.8           59.4                5.1 +/-    0.69       5.8 +/-    0.69  0.130 / 0.250
G30     136.9          62.4                6.9 +/-    0.75       7.6 +/-    0.75  0.110 / 0.270