PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/30-05:27:40
G10     294.6          50.8                5.4 +/-    2.11       6.7 +/-    2.11  0.050 / 0.030
G15     46.5           30.2                4.3 +/-    1.35       7.4 +/-    1.35  0.040 / 0.030
G20     20.4           62.7                5.4 +/-    1.44       6.0 +/-    1.44  0.080 / 0.080
G21     88.6           75.6                5.6 +/-    0.78       5.8 +/-    0.78  0.060 / 0.080
G24     99.0           25.8                5.0 +/-    1.56       9.6 +/-    1.56  0.080 / 0.110
G27     302.1          33.6                4.0 +/-    2.82       6.6 +/-    2.82  0.090 / 0.130
G32     209.5          32.0                6.2 +/-    1.62      10.5 +/-    1.62  0.120 / 0.090