PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-08:12:40
G07     35.7           69.1                4.8 +/-    0.89       5.1 +/-    0.89  0.030 / 0.030
G08     59.8           47.4                4.2 +/-    0.83       5.4 +/-    0.83  0.040 / 0.030
G09     178.1          43.9                6.2 +/-    1.02       8.5 +/-    1.02  0.140 / 0.250
G11     127.4          31.5                5.9 +/-    0.66      10.0 +/-    0.66  0.080 / 0.310
G18     109.7          12.8                6.1 +/-    2.80      15.9 +/-    2.80  0.050 / 0.060
G23     159.8          13.5                3.0 +/-    2.47       7.9 +/-    2.47  0.050 / 0.050
G27     38.8           13.6                2.1 +/-    1.99       5.5 +/-    1.99  0.130 / 0.330
G28     259.4          42.4                5.9 +/-    2.48       8.2 +/-    2.48  0.130 / 0.380
G30     323.1          53.4                3.5 +/-    0.58       4.2 +/-    0.58  0.110 / 0.110