PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-20:58:10
G01     320.8          11.5               -8.2 +/-   39.13     -22.0 +/-   39.13  0.150 / 0.410
G08     263.9          16.8               12.8 +/-    0.70      30.4 +/-    0.70  0.200 / 0.450
G10     66.0           57.7               11.1 +/-    0.87      12.9 +/-    0.87  0.300 / 0.410
G11     309.3          19.2               10.8 +/-    1.27      24.2 +/-    1.27  0.360 / 0.420
G14     276.1          68.4               12.0 +/-    0.59      12.8 +/-    0.59  0.090 / 0.120
G18     95.5           33.2               11.2 +/-    1.00      18.5 +/-    1.00  0.070 / 0.090
G27     228.3          13.3               12.6 +/-    2.32      32.6 +/-    2.32  0.050 / 0.040
G31     180.0          31.2               13.9 +/-    0.90      23.8 +/-    0.90  0.050 / 0.050
G32     342.7          72.9               11.4 +/-    0.43      11.9 +/-    0.43  0.030 / 0.020