PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-17:42:30
G07     12.2           67.8               13.9 +/-    0.68      14.9 +/-    0.68  0.040 / 0.050
G08     67.3           50.8               13.9 +/-    0.80      17.3 +/-    0.80  0.060 / 0.050
G09     180.3          50.9               15.8 +/-    1.08      19.7 +/-    1.08  0.040 / 0.050
G11     132.1          26.6               12.0 +/-    1.77      22.5 +/-    1.77  0.050 / 0.040
G18     115.8          9.6                -8.1 +/-   14.47     -22.7 +/-   14.47  0.030 / 0.040
G23     158.3          15.9               14.9 +/-    1.72      36.4 +/-    1.72  0.040 / 0.040
G27     40.7           17.5               11.2 +/-    2.77      26.2 +/-    2.77  0.120 / 0.100
G28     258.2          45.2               13.7 +/-    2.72      18.4 +/-    2.72  0.100 / 0.110
G30     320.5          50.9               12.9 +/-    0.70      16.1 +/-    0.70  0.120 / 0.230