PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-18:37:50
G10     299.3          52.1               11.3 +/-    1.17      13.9 +/-    1.17  0.090 / 0.080
G14     210.7          14.2               13.1 +/-    3.94      33.2 +/-    3.94  0.070 / 0.070
G15     45.7           25.5               10.1 +/-    1.02      19.5 +/-    1.02  0.030 / 0.050
G18     6.0            65.4                9.3 +/-    1.01      10.1 +/-    1.01  0.030 / 0.050
G20     72.2           18.3               10.5 +/-    0.67      24.0 +/-    0.67  0.080 / 0.150
G21     107.7          68.8               12.5 +/-    1.07      13.3 +/-    1.07  0.070 / 0.120
G24     96.9           27.3               15.0 +/-    1.15      27.8 +/-    1.15  0.070 / 0.180
G27     296.8          35.8               11.5 +/-    1.32      18.1 +/-    1.32  0.090 / 0.200
G32     212.0          32.3               12.0 +/-    1.14      20.1 +/-    1.14  0.060 / 0.100