PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/22-21:28:10
G01     227.5          18.5                8.9 +/-    2.16      20.2 +/-    2.16  0.140 / 0.270
G03     292.0          66.6                5.2 +/-    0.90       5.6 +/-    0.90  0.140 / 0.350
G14     85.1           24.7                8.1 +/-    0.90      15.9 +/-    0.90  0.040 / 0.080
G16     149.5          42.3                9.1 +/-    1.36      12.8 +/-    1.36  0.050 / 0.090
G22     222.5          71.9                6.9 +/-    0.76       7.2 +/-    0.76  0.090 / 0.210
G23     304.8          34.2                7.7 +/-    1.04      12.4 +/-    1.04  0.080 / 0.200
G26     105.8          54.3                7.8 +/-    0.32       9.3 +/-    0.32  0.040 / 0.050
G31     43.4           37.9                4.2 +/-    1.19       6.4 +/-    1.19  0.030 / 0.050