PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-00:12:40
G10     243.9          20.8               14.3 +/-    2.25      30.9 +/-    2.25  0.140 / 0.580
G13     62.0           33.8               10.1 +/-    1.16      16.4 +/-    1.16  0.120 / 0.540
G15     108.3          57.8               12.6 +/-    0.74      14.6 +/-    0.74  0.040 / 0.060
G16     302.5          15.7                7.7 +/-    4.32      18.8 +/-    4.32  0.040 / 0.050
G20     252.7          29.6                9.3 +/-    1.42      16.4 +/-    1.42  0.080 / 0.120
G21     323.2          53.7               12.4 +/-    1.52      15.0 +/-    1.52  0.080 / 0.170
G26     274.4          18.7               11.1 +/-    1.00      25.2 +/-    1.00  0.040 / 0.050
G29     162.6          60.6               12.8 +/-    0.74      14.5 +/-    0.74  0.030 / 0.050