PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-14:27:50
G01     111.2          22.3                8.6 +/-    1.58      18.0 +/-    1.58  0.030 / 0.050
G07     101.9          57.7                9.1 +/-    0.76      10.5 +/-    0.76  0.030 / 0.060
G08     43.0           26.5                7.4 +/-    0.79      13.9 +/-    0.79  0.040 / 0.070
G09     176.4          19.7                9.3 +/-    0.97      20.6 +/-    0.97  0.050 / 0.070
G11     95.7           43.0                8.4 +/-    0.53      11.6 +/-    0.53  0.040 / 0.080
G13     312.9          26.2                8.2 +/-    1.36      15.5 +/-    1.36  0.040 / 0.080
G17     203.7          30.3               10.1 +/-    1.35      17.6 +/-    1.35  0.080 / 0.200
G18     84.7           23.1                6.4 +/-    0.92      13.0 +/-    0.92  0.090 / 0.240
G28     297.5          56.8                8.3 +/-    0.97       9.7 +/-    0.97  0.080 / 0.100
G30     13.0           76.0                9.7 +/-    0.83       9.9 +/-    0.83  0.050 / 0.120