PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-16:42:50
G07     345.7          62.2               10.2 +/-    0.64      11.4 +/-    0.64  0.040 / 0.060
G08     87.8           53.7               11.6 +/-    0.78      14.1 +/-    0.78  0.040 / 0.060
G09     184.0          64.6               11.4 +/-    1.47      12.4 +/-    1.47  0.060 / 0.110
G11     141.1          18.3               11.8 +/-    2.27      27.1 +/-    2.27  0.070 / 0.080
G23     156.4          28.6               11.8 +/-    1.24      21.2 +/-    1.24  0.090 / 0.340
G27     47.8           26.5               10.2 +/-    1.68      19.2 +/-    1.68  0.120 / 0.390
G28     244.8          36.3               13.4 +/-    1.94      20.8 +/-    1.94  0.030 / 0.050
G30     309.4          41.5                9.3 +/-    1.50      13.2 +/-    1.50  0.030 / 0.030