PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/17-19:42:40
G07     305.3          45.4               13.2 +/-    1.72      17.7 +/-    1.72  0.050 / 0.050
G08     133.5          39.0               15.4 +/-    0.61      22.8 +/-    0.61  0.050 / 0.070
G09     307.2          76.6               13.0 +/-    0.90      13.4 +/-    0.90  0.110 / 0.180
G16     41.9           25.0               11.5 +/-    1.95      22.6 +/-    1.95  0.100 / 0.180
G23     142.5          61.9               14.6 +/-    0.37      16.3 +/-    0.37  0.040 / 0.060
G27     79.7           37.0               12.1 +/-    1.43      18.5 +/-    1.43  0.040 / 0.060
G28     223.7          12.2               13.0 +/-   26.46      34.6 +/-   26.46  0.130 / 0.440
G30     286.3          23.9               12.0 +/-    1.09      24.0 +/-    1.09  0.210 / 0.380