PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-14:57:30
G01     318.7          18.7                5.6 +/-    2.06      12.7 +/-    2.06  0.440 / 0.480
G08     259.2          12.6                6.5 +/-    2.82      17.1 +/-    2.82  0.220 / 0.190
G10     81.0           53.0                4.1 +/-    0.95       5.0 +/-    0.95  0.040 / 0.040
G11     304.6          21.6                6.2 +/-    1.22      13.2 +/-    1.22  0.040 / 0.040
G14     295.8          69.9                4.2 +/-    0.70       4.4 +/-    0.70  0.050 / 0.050
G22     301.5          12.7                5.3 +/-    7.35      13.8 +/-    7.35  0.040 / 0.050
G31     175.1          43.9                6.4 +/-    1.01       8.7 +/-    1.01  0.220 / 0.220
G32     11.2           66.2                3.2 +/-    0.49       3.5 +/-    0.49  0.230 / 0.240