PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-06:27:50
G10     276.8          43.3                3.5 +/-    0.39       4.8 +/-    0.39  0.060 / 0.060
G13     38.8           11.7                2.7 +/-    2.02       7.3 +/-    2.02  0.050 / 0.040
G15     51.7           41.5                3.9 +/-    0.81       5.6 +/-    0.81  0.070 / 0.140
G20     20.8           62.7                3.4 +/-    0.64       3.8 +/-    0.64  0.080 / 0.130
G21     29.7           76.3                4.2 +/-    0.45       4.3 +/-    0.45  0.110 / 0.220
G24     112.7          19.2                6.1 +/-    1.08      13.7 +/-    1.08  0.110 / 0.190
G27     313.5          25.7                3.4 +/-    1.41       6.5 +/-    1.41  0.060 / 0.060
G29     168.8          22.5                4.4 +/-    2.40       9.0 +/-    2.40  0.050 / 0.070
G32     205.5          18.7                5.3 +/-    1.02      12.0 +/-    1.02  0.040 / 0.050