PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-06:57:30
G10     291.3          50.3                5.4 +/-    0.60       6.8 +/-    0.60  0.040 / 0.050
G15     46.9           31.2                3.7 +/-    0.58       6.4 +/-    0.58  0.050 / 0.050
G20     341.2          65.3                4.6 +/-    0.79       5.0 +/-    0.79  0.060 / 0.050
G21     82.9           75.0                6.4 +/-    1.43       6.6 +/-    1.43  0.040 / 0.050
G24     101.8          24.5                5.3 +/-    0.84      10.5 +/-    0.84  0.060 / 0.090
G27     306.8          30.8                4.0 +/-    2.31       6.8 +/-    2.31  0.070 / 0.090
G32     209.5          22.7                4.6 +/-    2.44       9.5 +/-    2.44  0.080 / 0.130