PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-18:43:00
G01     318.0          20.8                8.0 +/-    2.30      17.2 +/-    2.30  0.230 / 0.240
G08     252.5          11.5                9.4 +/-    6.32      25.3 +/-    6.32  0.370 / 0.240
G10     85.0           50.7                8.5 +/-    0.52      10.6 +/-    0.52  0.030 / 0.030
G11     298.8          25.3                8.6 +/-    1.42      16.7 +/-    1.42  0.040 / 0.040
G14     309.3          71.5                7.8 +/-    0.58       8.1 +/-    0.58  0.090 / 0.200
G18     298.8          45.4                9.5 +/-    4.95      12.8 +/-    4.95  0.090 / 0.160
G20     108.2          26.6                7.1 +/-    1.25      13.4 +/-    1.25  0.050 / 0.030
G22     302.4          12.4                8.7 +/-    2.76      23.0 +/-    2.76  0.060 / 0.040
G31     178.5          42.4                8.6 +/-    1.02      12.1 +/-    1.02  0.190 / 0.330
G32     11.5           65.8                7.2 +/-    0.56       7.8 +/-    0.56  0.220 / 0.240