PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-16:28:10
G07     342.6          61.3               12.9 +/-    0.52      14.4 +/-    0.52  0.040 / 0.040
G08     100.4          51.3               13.7 +/-    0.71      17.0 +/-    0.71  0.040 / 0.050
G09     197.7          76.0               12.5 +/-    1.19      12.9 +/-    1.19  0.090 / 0.240
G11     145.5          13.4               14.6 +/-    3.59      37.7 +/-    3.59  0.090 / 0.220
G16     46.2           10.6               11.8 +/-    2.87      32.6 +/-    2.87  0.080 / 0.360
G23     155.0          42.7               13.9 +/-    0.55      19.3 +/-    0.55  0.110 / 0.500
G27     57.7           33.4               11.1 +/-    0.35      18.1 +/-    0.35  0.050 / 0.070
G28     235.0          24.2               14.7 +/-    4.94      29.3 +/-    4.94  0.040 / 0.070
G30     302.1          36.1               12.7 +/-    1.04      19.7 +/-    1.04  0.040 / 0.080