PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-14:42:50
G01     56.7           28.9                7.3 +/-    1.12      13.2 +/-    1.12  0.160 / 0.160
G07     142.6          16.6                8.2 +/-    2.17      19.7 +/-    2.17  0.110 / 0.170
G11     47.0           22.3                6.7 +/-    2.98      13.9 +/-    2.98  0.030 / 0.050
G13     258.3          35.1                9.2 +/-    1.97      14.6 +/-    1.97  0.030 / 0.030
G15     291.4          16.3                8.7 +/-    1.59      20.9 +/-    1.59  0.050 / 0.050
G17     259.3          75.3                9.9 +/-    0.62      10.2 +/-    0.62  0.040 / 0.040
G18     40.1           10.7                5.7 +/-    3.23      15.6 +/-    3.23  0.080 / 0.070
G19     234.7          54.4                9.7 +/-    2.52      11.6 +/-    2.52  0.070 / 0.070
G28     29.4           58.9                8.7 +/-    0.60       9.9 +/-    0.60  0.150 / 0.330
G30     145.2          48.7                9.6 +/-    0.66      12.3 +/-    0.66  0.120 / 0.240