PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-16:27:30
G07     312.2          48.9               10.4 +/-    0.93      13.2 +/-    0.93  0.050 / 0.070
G08     126.1          43.9               13.6 +/-    0.45      18.7 +/-    0.45  0.040 / 0.070
G09     277.7          82.2               12.1 +/-    1.83      12.2 +/-    1.83  0.040 / 0.050
G16     42.9           18.3                7.8 +/-    0.79      17.8 +/-    0.79  0.040 / 0.070
G23     146.7          52.8               13.5 +/-    1.10      16.5 +/-    1.10  0.040 / 0.060
G27     72.1           36.8                9.1 +/-    0.47      14.0 +/-    0.47  0.040 / 0.060
G28     227.0          17.2               13.9 +/-    1.03      32.9 +/-    1.03  0.110 / 0.360
G30     290.4          26.1               11.9 +/-    1.38      22.7 +/-    1.38  0.140 / 0.420