PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-08:12:40
G07     35.8           69.4                5.5 +/-    0.92       5.9 +/-    0.92  0.030 / 0.030
G08     54.5           42.4                3.9 +/-    1.10       5.5 +/-    1.10  0.030 / 0.030
G09     174.4          37.7                7.6 +/-    1.19      11.5 +/-    1.19  0.030 / 0.040
G11     123.2          31.9                5.4 +/-    0.98       9.2 +/-    0.98  0.030 / 0.040
G18     107.9          13.5                5.2 +/-    2.25      13.5 +/-    2.25  0.110 / 0.300
G23     161.1          14.6                5.0 +/-    2.67      12.5 +/-    2.67  0.070 / 0.380
G27     38.8           13.4                2.6 +/-    2.05       6.6 +/-    2.05  0.110 / 0.260
G28     265.9          48.5                7.2 +/-    3.22       9.2 +/-    3.22  0.120 / 0.270
G30     324.3          54.0                4.1 +/-    0.46       5.0 +/-    0.46  0.170 / 0.330