PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/09-17:58:00
G03     185.3          10.7               13.3 +/-    3.71      36.4 +/-    3.71  0.050 / 0.100
G07     299.9          42.5               13.5 +/-    2.50      18.8 +/-    2.50  0.070 / 0.080
G08     138.9          34.6               17.2 +/-    0.92      27.5 +/-    0.92  0.020 / 0.030
G09     315.1          72.0               14.2 +/-    0.56      14.9 +/-    0.56  0.030 / 0.030
G16     41.6           28.8               11.5 +/-    0.91      20.6 +/-    0.91  0.060 / 0.110
G23     137.2          65.8               15.3 +/-    0.36      16.6 +/-    0.36  0.120 / 0.080
G27     86.5           36.6               13.4 +/-    1.07      20.6 +/-    1.07  0.150 / 0.200
G30     282.0          20.1               14.8 +/-    1.69      32.5 +/-    1.69  0.100 / 0.130