PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-23:12:50
G10     248.4          23.9               11.4 +/-    1.32      22.8 +/-    1.32  0.030 / 0.040
G13     57.2           32.7                9.2 +/-    0.80      15.3 +/-    0.80  0.040 / 0.060
G15     94.4           58.2               12.1 +/-    0.66      13.9 +/-    0.66  0.130 / 0.360
G16     300.5          14.4                8.2 +/-    1.54      20.6 +/-    1.54  0.110 / 0.380
G18     264.8          53.7               12.1 +/-    1.02      14.6 +/-    1.02  0.070 / 0.170
G20     41.7           49.8                8.9 +/-    0.58      11.3 +/-    0.58  0.070 / 0.140
G21     330.8          58.8                9.4 +/-    0.42      10.8 +/-    0.42  0.040 / 0.060
G26     272.7          16.3               10.8 +/-    2.21      26.0 +/-    2.21  0.040 / 0.050
G29     162.9          49.8               12.3 +/-    3.28      15.6 +/-    3.28  0.080 / 0.050