PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-12:12:40
G07     325.6          56.0                4.7 +/-    0.66       5.6 +/-    0.66  0.160 / 0.300
G08     117.4          47.5                7.2 +/-    1.31       9.3 +/-    1.31  0.260 / 0.290
G09     237.2          82.5                7.6 +/-    0.73       7.7 +/-    0.73  0.030 / 0.050
G16     44.1           15.3                3.9 +/-    2.01       9.7 +/-    2.01  0.040 / 0.050
G23     150.3          48.9                7.2 +/-    0.86       9.2 +/-    0.86  0.060 / 0.070
G27     66.8           36.1                5.4 +/-    1.82       8.3 +/-    1.82  0.060 / 0.070
G28     229.2          16.3                5.9 +/-    2.03      14.3 +/-    2.03  0.160 / 0.340
G30     295.4          30.9                6.3 +/-    1.53      10.8 +/-    1.53  0.190 / 0.250