PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/10-05:58:00
G10     265.8          37.3                8.1 +/-    1.40      12.3 +/-    1.40  0.190 / 0.470
G13     42.5           19.4                5.4 +/-    2.32      12.1 +/-    2.32  0.160 / 0.380
G15     60.2           49.3                7.1 +/-    0.74       9.0 +/-    0.74  0.150 / 0.120
G16     279.4          12.4                7.3 +/-    2.49      19.4 +/-    2.49  0.110 / 0.130
G20     356.8          67.9                6.5 +/-    0.49       7.0 +/-    0.49  0.040 / 0.030
G21     359.5          71.1                7.0 +/-    0.65       7.4 +/-    0.65  0.040 / 0.040
G24     121.1          13.6                7.4 +/-    2.12      19.0 +/-    2.12  0.040 / 0.040
G27     318.9          18.4                6.9 +/-    2.93      15.9 +/-    2.93  0.040 / 0.030
G29     168.1          32.7                6.5 +/-    1.36      10.8 +/-    1.36  0.180 / 0.260