PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-16:42:50
G07     339.3          60.2               10.4 +/-    0.92      11.8 +/-    0.92  0.030 / 0.050
G08     94.9           53.5               10.7 +/-    0.34      12.9 +/-    0.34  0.030 / 0.050
G09     186.7          68.8               11.6 +/-    1.10      12.3 +/-    1.10  0.070 / 0.080
G11     143.6          15.9               12.7 +/-    1.38      30.9 +/-    1.38  0.080 / 0.090
G23     155.4          32.3               12.1 +/-    0.57      20.2 +/-    0.57  0.100 / 0.150
G27     50.7           28.8                7.5 +/-    1.21      13.4 +/-    1.21  0.100 / 0.160
G28     241.4          33.4               12.4 +/-    1.23      20.3 +/-    1.23  0.120 / 0.280
G30     306.3          39.0                8.7 +/-    0.88      12.9 +/-    0.88  0.110 / 0.210