PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-19:28:00
G07     6.1            66.8               13.6 +/-    0.55      14.7 +/-    0.55  0.030 / 0.030
G08     73.1           52.9               13.3 +/-    0.66      16.3 +/-    0.66  0.050 / 0.040
G09     181.4          54.1               16.5 +/-    0.91      19.9 +/-    0.91  0.100 / 0.230
G11     134.8          24.7               18.6 +/-    2.98      36.6 +/-    2.98  0.100 / 0.210
G23     158.3          19.2               16.7 +/-    1.04      37.4 +/-    1.04  0.050 / 0.060
G27     41.7           19.2               11.0 +/-    2.27      24.7 +/-    2.27  0.050 / 0.070
G28     255.4          43.6               14.9 +/-    3.43      20.5 +/-    3.43  0.020 / 0.050
G30     319.1          49.8               13.0 +/-    0.74      16.4 +/-    0.74  0.030 / 0.020