PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-12:27:50
G08     319.1          12.0                2.8 +/-    3.83       7.4 +/-    3.83  0.110 / 0.430
G10     313.0          56.1                2.9 +/-    0.81       3.4 +/-    0.81  0.110 / 0.460
G14     213.9          19.8                3.7 +/-    1.58       8.1 +/-    1.58  0.040 / 0.040
G15     45.5           17.8                2.9 +/-    1.23       6.7 +/-    1.23  0.040 / 0.050
G20     76.8           16.6                4.0 +/-    1.21       9.6 +/-    1.21  0.140 / 0.360
G21     122.0          64.3                7.9 +/-    0.98       8.6 +/-    0.98  0.140 / 0.300
G24     86.6           29.6                5.3 +/-    0.64       9.3 +/-    0.64  0.060 / 0.080
G27     286.9          37.7                5.0 +/-    0.91       7.6 +/-    0.91  0.050 / 0.070
G32     215.9          43.1                6.4 +/-    1.42       8.8 +/-    1.42  0.080 / 0.110