PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-17:42:40
G07     341.5          61.0               10.2 +/-    0.43      11.5 +/-    0.43  0.040 / 0.040
G08     99.2           51.2               12.6 +/-    0.51      15.7 +/-    0.51  0.040 / 0.040
G09     196.8          75.8               10.4 +/-    0.39      10.7 +/-    0.39  0.070 / 0.090
G11     145.2          13.5               12.7 +/-    1.23      32.8 +/-    1.23  0.080 / 0.070
G16     46.2           11.3                9.2 +/-    2.36      24.9 +/-    2.36  0.030 / 0.030
G23     155.3          43.2               12.8 +/-    1.09      17.7 +/-    1.09  0.030 / 0.030
G27     57.7           33.5                9.1 +/-    1.32      14.8 +/-    1.32  0.040 / 0.080
G28     235.2          24.6               13.4 +/-    2.09      26.5 +/-    2.09  0.050 / 0.090
G30     301.8          35.6               10.6 +/-    1.58      16.6 +/-    1.58  0.250 / 0.470