PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-18:42:30
G07     343.4          61.5               10.7 +/-    0.47      12.0 +/-    0.47  0.040 / 0.020
G08     92.9           54.3               13.0 +/-    0.96      15.6 +/-    0.96  0.050 / 0.030
G09     185.9          66.5               11.0 +/-    0.68      11.9 +/-    0.68  0.060 / 0.110
G11     142.6          17.2               14.2 +/-    3.00      33.4 +/-    3.00  0.050 / 0.120
G23     156.2          30.1               12.7 +/-    0.92      22.1 +/-    0.92  0.070 / 0.030
G27     48.6           27.1                8.7 +/-    1.48      16.1 +/-    1.48  0.080 / 0.020
G28     243.7          35.5               14.1 +/-    2.50      22.2 +/-    2.50  0.040 / 0.020
G30     309.1          41.5               10.0 +/-    1.23      14.1 +/-    1.23  0.050 / 0.020