PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/14-08:43:10
G10     299.5          52.3                4.7 +/-    1.72       5.7 +/-    1.72  0.080 / 0.040
G15     45.8           26.0                3.5 +/-    2.75       6.8 +/-    2.75  0.090 / 0.050
G20     58.9           40.9                3.9 +/-    1.40       5.5 +/-    1.40  0.040 / 0.040
G21     102.0          72.8                6.2 +/-    0.66       6.4 +/-    0.66  0.040 / 0.040
G24     95.9           27.1                5.6 +/-    1.76      10.5 +/-    1.76  0.060 / 0.040
G27     297.9          35.3                5.2 +/-    1.83       8.2 +/-    1.83  0.070 / 0.040
G32     211.1          35.1                4.9 +/-    2.12       7.8 +/-    2.12  0.070 / 0.060