PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/20-18:58:00
G01     320.7          12.1                6.8 +/-    2.45      18.2 +/-    2.45  0.180 / 0.460
G08     264.0          16.4                9.4 +/-    1.87      22.6 +/-    1.87  0.120 / 0.470
G10     67.5           57.3                7.8 +/-    0.75       9.1 +/-    0.75  0.130 / 0.310
G11     309.4          18.9                9.5 +/-    1.36      21.6 +/-    1.36  0.140 / 0.220
G14     276.9          68.2                9.1 +/-    0.49       9.8 +/-    0.49  0.050 / 0.080
G18     96.5           32.1                8.8 +/-    0.86      14.7 +/-    0.86  0.050 / 0.080
G27     227.8          12.8                9.7 +/-    6.33      25.3 +/-    6.33  0.050 / 0.050
G31     178.8          33.2                9.9 +/-    2.37      16.2 +/-    2.37  0.040 / 0.050
G32     348.5          72.2                9.6 +/-    0.54      10.0 +/-    0.54  0.020 / 0.030