PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-15:57:50
G07     307.3          46.4               13.6 +/-    1.04      17.9 +/-    1.04  0.050 / 0.080
G08     130.4          40.7               15.4 +/-    0.72      22.1 +/-    0.72  0.050 / 0.090
G09     300.6          79.2               12.8 +/-    0.78      13.0 +/-    0.78  0.040 / 0.050
G16     42.2           22.0               10.4 +/-    0.92      21.8 +/-    0.92  0.040 / 0.050
G23     143.7          57.7               13.4 +/-    1.02      15.5 +/-    1.02  0.080 / 0.240
G27     77.8           37.2               12.8 +/-    1.19      19.5 +/-    1.19  0.090 / 0.260
G28     224.6          13.5               13.0 +/-    4.34      33.6 +/-    4.34  0.180 / 0.610
G30     286.9          23.3               11.2 +/-    1.19      22.7 +/-    1.19  0.210 / 0.760