PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-20:13:00
G07     15.4           68.2               12.7 +/-    0.53      13.5 +/-    0.53  0.040 / 0.040
G08     67.4           51.5               13.6 +/-    1.04      16.9 +/-    1.04  0.040 / 0.050
G09     180.7          50.1               15.8 +/-    1.11      19.9 +/-    1.11  0.180 / 0.340
G11     132.1          27.1               14.2 +/-    2.91      26.5 +/-    2.91  0.130 / 0.300
G18     114.9          10.3                7.5 +/-   31.37      20.7 +/-   31.37  0.030 / 0.040
G23     158.9          16.0               16.6 +/-    2.11      40.3 +/-    2.11  0.030 / 0.030
G27     40.1           16.3               10.2 +/-    1.91      24.6 +/-    1.91  0.040 / 0.050
G28     259.9          46.2               14.4 +/-    3.40      19.1 +/-    3.40  0.040 / 0.040
G30     323.0          52.9               10.7 +/-    0.55      13.1 +/-    0.55  0.190 / 0.370