PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-21:58:00
G01     227.4          18.4                8.8 +/-    2.50      20.0 +/-    2.50  0.140 / 0.380
G03     291.9          66.6                5.3 +/-    1.03       5.7 +/-    1.03  0.140 / 0.360
G14     85.2           24.7                8.0 +/-    1.20      15.8 +/-    1.20  0.070 / 0.100
G16     149.0          42.6                8.3 +/-    0.76      11.5 +/-    0.76  0.050 / 0.110
G22     222.6          71.9                6.5 +/-    1.12       6.8 +/-    1.12  0.100 / 0.240
G23     304.9          34.3                7.5 +/-    0.62      12.1 +/-    0.62  0.090 / 0.200
G26     104.9          54.3                7.8 +/-    0.44       9.3 +/-    0.44  0.040 / 0.070
G31     43.6           37.3                4.6 +/-    0.51       7.1 +/-    0.51  0.050 / 0.090