PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-07:13:10
G10     261.2          34.3                6.3 +/-    1.31      10.2 +/-    1.31  0.100 / 0.300
G13     45.0           22.8                3.0 +/-    1.42       6.2 +/-    1.42  0.110 / 0.250
G15     65.3           51.9                5.2 +/-    0.43       6.4 +/-    0.43  0.130 / 0.290
G16     284.0          13.6                3.6 +/-    1.24       9.3 +/-    1.24  0.200 / 0.370
G20     17.1           64.8                4.6 +/-    0.48       5.0 +/-    0.48  0.090 / 0.110
G21     351.4          68.4                3.5 +/-    1.14       3.7 +/-    1.14  0.090 / 0.120
G24     124.9          10.9               -3.1 +/-   30.42      -8.5 +/-   30.42  0.270 / 0.340
G26     256.3          10.4                4.3 +/-    1.55      11.8 +/-    1.55  0.110 / 0.330
G27     320.5          15.0                1.8 +/-    1.26       4.4 +/-    1.26  0.040 / 0.040
G29     167.3          37.1                6.0 +/-    1.65       9.1 +/-    1.65  0.040 / 0.060