PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-19:43:10
G07     36.1           69.7               13.1 +/-    0.97      13.9 +/-    0.97  0.040 / 0.020
G08     57.7           47.0               12.1 +/-    0.63      15.9 +/-    0.63  0.050 / 0.020
G09     179.4          42.0               13.8 +/-    0.68      19.4 +/-    0.68  0.150 / 0.300
G11     125.4          31.9               14.6 +/-    0.94      24.6 +/-    0.94  0.160 / 0.270
G18     108.8          14.1               13.0 +/-    2.19      33.0 +/-    2.19  0.040 / 0.020
G27     37.9           10.6               10.1 +/-    2.37      27.9 +/-    2.37  0.030 / 0.020
G28     269.5          50.6               12.6 +/-    2.68      15.8 +/-    2.68  0.030 / 0.010
G30     330.2          58.2               11.9 +/-    0.64      13.8 +/-    0.64  0.030 / 0.010