PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-13:57:50
G10     266.2          37.2                5.0 +/-    1.09       7.6 +/-    1.09  0.100 / 0.230
G13     42.6           19.7                3.8 +/-    0.75       8.5 +/-    0.75  0.120 / 0.210
G15     58.6           47.7                6.0 +/-    0.64       7.8 +/-    0.64  0.040 / 0.040
G16     282.5          11.6                3.6 +/-    2.18       9.7 +/-    2.18  0.030 / 0.040
G18     304.5          65.6                3.6 +/-    0.74       3.9 +/-    0.74  0.130 / 0.360
G20     51.9           39.0                4.0 +/-    0.62       5.9 +/-    0.62  0.110 / 0.300
G21     13.7           73.0                5.4 +/-    0.95       5.6 +/-    0.95  0.040 / 0.080
G24     121.8          13.6                6.3 +/-    2.09      16.3 +/-    2.09  0.040 / 0.090
G27     318.3          19.4                3.3 +/-    1.83       7.4 +/-    1.83  0.110 / 0.220
G29     166.7          29.0                8.2 +/-    1.32      14.7 +/-    1.32  0.110 / 0.200