PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-12:27:30
G07     34.5           69.6                6.1 +/-    0.97       6.4 +/-    0.97  0.040 / 0.050
G08     54.9           43.1                6.4 +/-    1.19       8.8 +/-    1.19  0.030 / 0.050
G09     177.2          40.6                6.1 +/-    1.54       8.8 +/-    1.54  0.040 / 0.030
G11     123.4          31.9                5.1 +/-    1.36       8.5 +/-    1.36  0.030 / 0.030
G18     108.7          13.6                5.2 +/-    1.98      13.3 +/-    1.98  0.170 / 0.180
G23     160.4          12.7                3.1 +/-    1.77       8.1 +/-    1.77  0.140 / 0.240
G27     38.3           12.1                3.7 +/-    2.15       9.8 +/-    2.15  0.150 / 0.120
G28     267.3          49.4                6.1 +/-    5.43       7.7 +/-    5.43  0.310 / 0.210
G30     325.3          54.8                5.1 +/-    0.43       6.1 +/-    0.43  0.160 / 0.340