PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-09:42:50
G05     51.4           10.7                2.3 +/-    1.06       6.4 +/-    1.06  0.100 / 0.300
G10     240.3          16.5                4.3 +/-    1.09      10.4 +/-    1.09  0.120 / 0.330
G13     68.7           36.0                3.6 +/-    0.84       5.6 +/-    0.84  0.070 / 0.050
G15     110.8          55.4                5.1 +/-    0.47       6.0 +/-    0.47  0.040 / 0.040
G16     309.6          13.6                2.7 +/-    1.74       6.9 +/-    1.74  0.050 / 0.060
G20     24.2           66.5                3.0 +/-    0.38       3.3 +/-    0.38  0.040 / 0.060
G21     320.7          52.5                5.0 +/-    1.58       6.1 +/-    1.58  0.110 / 0.220
G26     280.9          19.6                2.6 +/-    1.14       5.7 +/-    1.14  0.160 / 0.250
G29     159.0          63.9                6.1 +/-    0.93       6.7 +/-    0.93  0.100 / 0.240