PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-17:58:10
G07     21.7           68.9                9.2 +/-    1.00       9.8 +/-    1.00  0.050 / 0.060
G08     62.5           49.0               11.9 +/-    0.50      15.2 +/-    0.50  0.060 / 0.070
G09     179.8          47.0               13.5 +/-    1.93      17.7 +/-    1.93  0.030 / 0.040
G11     129.1          28.9               15.7 +/-    0.88      28.1 +/-    0.88  0.040 / 0.040
G18     112.9          11.5               13.8 +/-    1.63      37.3 +/-    1.63  0.070 / 0.310
G23     158.5          12.4               14.6 +/-    0.96      38.6 +/-    0.96  0.070 / 0.260
G27     39.4           14.7                8.0 +/-    1.78      20.1 +/-    1.78  0.110 / 0.190
G28     262.6          47.5               12.1 +/-    1.62      15.8 +/-    1.62  0.120 / 0.170
G30     324.0          53.6               10.0 +/-    1.52      12.1 +/-    1.52  0.050 / 0.050