PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-06:57:30
G10     294.5          50.7                4.0 +/-    1.08       5.0 +/-    1.08  0.050 / 0.040
G15     46.4           29.6                2.1 +/-    1.43       3.7 +/-    1.43  0.050 / 0.050
G20     41.9           54.6                4.6 +/-    0.67       5.5 +/-    0.67  0.050 / 0.090
G21     89.4           75.3                4.7 +/-    0.77       4.8 +/-    0.77  0.060 / 0.090
G24     99.4           25.8                6.1 +/-    0.76      11.8 +/-    0.76  0.070 / 0.110
G27     301.9          33.7                3.5 +/-    1.56       5.6 +/-    1.56  0.060 / 0.140
G32     209.6          31.9                3.4 +/-    0.85       5.8 +/-    0.85  0.040 / 0.050