PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-08:27:50
G01     225.2          16.0                6.3 +/-    2.38      15.3 +/-    2.38  0.050 / 0.040
G03     284.3          67.9                4.1 +/-    0.89       4.4 +/-    0.89  0.050 / 0.040
G09     295.5          10.0              -14.8 +/-   17.16     -41.2 +/-   17.16  0.040 / 0.070
G14     87.0           25.3                4.7 +/-    1.51       9.1 +/-    1.51  0.050 / 0.080
G16     141.8          47.8                8.4 +/-    0.64      10.9 +/-    0.64  0.090 / 0.220
G22     210.8          68.9                7.7 +/-    0.73       8.2 +/-    0.73  0.110 / 0.210
G23     309.3          39.5                3.4 +/-    0.85       4.9 +/-    0.85  0.120 / 0.170
G26     90.6           53.6                8.2 +/-    0.58       9.9 +/-    0.58  0.110 / 0.200
G31     46.5           28.7               -0.2 +/-    0.62      -0.4 +/-    0.62  0.060 / 0.110