PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-17:27:50
G10     261.1          33.8               10.8 +/-    1.60      17.6 +/-    1.60  0.090 / 0.150
G13     45.5           23.7                8.4 +/-    3.03      17.0 +/-    3.03  0.310 / 0.180
G15     65.0           51.5               10.0 +/-    1.03      12.4 +/-    1.03  0.030 / 0.030
G16     289.9          12.3               10.2 +/-    4.19      27.1 +/-    4.19  0.030 / 0.030
G18     291.7          63.3               10.0 +/-    0.86      11.1 +/-    0.86  0.310 / 0.250
G20     49.7           40.7                8.7 +/-    1.14      12.6 +/-    1.14  0.340 / 0.310
G21     1.6            70.5               11.5 +/-    0.32      12.1 +/-    0.32  0.050 / 0.080
G24     126.0          10.6              -10.9 +/-   32.16     -30.0 +/-   32.16  0.070 / 0.080
G27     320.2          15.7                8.3 +/-    1.90      20.2 +/-    1.90  0.080 / 0.230
G29     164.9          31.8               12.5 +/-    0.86      21.0 +/-    0.86  0.110 / 0.220