PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/21-19:58:00
G01     305.7          34.1                8.6 +/-    1.89      13.9 +/-    1.89  0.080 / 0.180
G10     107.5          39.5                8.8 +/-    0.64      12.9 +/-    0.64  0.140 / 0.150
G11     281.0          28.1                9.1 +/-    1.13      16.6 +/-    1.13  0.100 / 0.130
G14     0.4            66.1                7.1 +/-    0.66       7.7 +/-    0.66  0.080 / 0.100
G18     118.7          11.6                9.9 +/-    1.64      26.6 +/-    1.64  0.030 / 0.030
G22     310.1          26.6                9.9 +/-    1.48      18.6 +/-    1.48  0.040 / 0.030
G25     80.4           17.0                8.8 +/-    2.12      20.7 +/-    2.12  0.040 / 0.030
G31     168.4          65.7               10.3 +/-    0.27      11.1 +/-    0.27  0.050 / 0.040
G32     37.0           51.9                6.9 +/-    1.15       8.6 +/-    1.15  0.030 / 0.040