PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-19:58:10
G01     68.4           32.7               11.7 +/-    0.84      19.5 +/-    0.84  0.070 / 0.280
G07     138.6          29.6               13.7 +/-    1.16      24.2 +/-    1.16  0.080 / 0.210
G11     52.9           30.1               11.6 +/-    1.74      20.2 +/-    1.74  0.040 / 0.030
G13     272.1          37.2               13.0 +/-    2.93      19.8 +/-    2.93  0.030 / 0.030
G15     301.1          15.5                7.1 +/-    2.09      17.3 +/-    2.09  0.060 / 0.090
G17     235.6          67.3               13.0 +/-    0.60      14.0 +/-    0.60  0.060 / 0.080
G18     47.7           17.4               10.6 +/-    2.16      24.9 +/-    2.16  0.030 / 0.040
G19     225.8          42.5               13.7 +/-    2.02      19.1 +/-    2.02  0.040 / 0.070
G28     23.7           58.7               10.9 +/-    1.14      12.5 +/-    1.14  0.120 / 0.200
G30     137.5          58.8               14.1 +/-    0.22      16.2 +/-    0.22  0.130 / 0.240