PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-05:57:50
G10     280.6          45.1                7.4 +/-    1.04      10.0 +/-    1.04  0.050 / 0.120
G15     50.0           39.1                5.3 +/-    0.83       7.8 +/-    0.83  0.060 / 0.080
G20     15.8           63.8                6.0 +/-    0.60       6.6 +/-    0.60  0.030 / 0.030
G21     42.2           77.1                7.0 +/-    0.41       7.1 +/-    0.41  0.030 / 0.040
G24     109.7          20.8                7.2 +/-    1.36      15.5 +/-    1.36  0.090 / 0.170
G27     311.4          27.7                6.8 +/-    1.77      12.6 +/-    1.77  0.100 / 0.170
G29     168.9          19.6                8.0 +/-    1.88      17.8 +/-    1.88  0.040 / 0.040
G32     206.2          21.7                9.2 +/-    0.93      19.4 +/-    0.93  0.040 / 0.030