PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-14:27:50
G01     318.9          18.2                5.0 +/-    2.00      11.5 +/-    2.00  0.400 / 0.490
G08     260.0          12.9                5.5 +/-    3.05      14.4 +/-    3.05  0.350 / 0.220
G10     80.1           53.4                4.9 +/-    0.62       6.0 +/-    0.62  0.030 / 0.040
G11     305.3          21.1                5.7 +/-    1.05      12.3 +/-    1.05  0.050 / 0.050
G14     293.4          69.6                6.3 +/-    0.25       6.6 +/-    0.25  0.050 / 0.050
G22     301.3          12.6                4.3 +/-    5.12      11.4 +/-    5.12  0.050 / 0.060
G31     175.1          43.4                8.8 +/-    1.09      12.1 +/-    1.09  0.040 / 0.030
G32     10.3           66.5                5.3 +/-    0.44       5.7 +/-    0.44  0.050 / 0.030