PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-13:27:40
G01     123.5          14.5               10.0 +/-    1.87      25.2 +/-    1.87  0.040 / 0.040
G07     66.1           68.6                7.8 +/-    0.80       8.3 +/-    0.80  0.040 / 0.040
G08     47.3           35.4                6.3 +/-    0.52       9.9 +/-    0.52  0.200 / 0.330
G09     176.4          29.9                8.0 +/-    1.14      14.1 +/-    1.14  0.150 / 0.250
G11     112.6          37.7                8.7 +/-    0.95      13.2 +/-    0.95  0.020 / 0.040
G13     319.7          15.4                3.4 +/-    3.01       8.5 +/-    3.01  0.020 / 0.030
G17     200.6          19.3                8.4 +/-    1.03      18.9 +/-    1.03  0.050 / 0.120
G18     99.2           18.7                8.7 +/-    1.35      19.9 +/-    1.35  0.050 / 0.110
G28     283.3          55.0                8.7 +/-    1.23      10.3 +/-    1.23  0.040 / 0.060
G30     337.2          63.6                6.6 +/-    0.59       7.3 +/-    0.59  0.040 / 0.050