PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-16:27:50
G07     338.5          60.2                9.3 +/-    0.80      10.5 +/-    0.80  0.030 / 0.060
G08     104.2          50.5                9.8 +/-    0.70      12.3 +/-    0.70  0.040 / 0.050
G09     204.1          78.3                9.5 +/-    0.97       9.7 +/-    0.97  0.110 / 0.200
G11     147.0          11.9               12.3 +/-    2.09      32.9 +/-    2.09  0.110 / 0.330
G16     45.5           12.5                6.3 +/-    1.66      16.6 +/-    1.66  0.170 / 0.380
G23     154.1          45.2               10.8 +/-    0.47      14.5 +/-    0.47  0.120 / 0.390
G27     60.2           34.4                7.5 +/-    0.52      12.0 +/-    0.52  0.050 / 0.080
G28     233.3          22.3               11.5 +/-    1.23      23.9 +/-    1.23  0.050 / 0.070
G30     300.2          34.6                9.1 +/-    1.35      14.6 +/-    1.35  0.200 / 0.270