PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-14:28:00
G10     299.3          52.2               20.8 +/-    1.09      25.6 +/-    1.09  0.080 / 0.080
G14     210.9          12.8                4.0 +/-    4.06      10.6 +/-    4.06  0.080 / 0.080
G15     45.7           25.2                4.7 +/-    1.18       9.2 +/-    1.18  0.070 / 0.260
G18     8.3            65.1                3.9 +/-    0.73       4.3 +/-    0.73  0.080 / 0.250
G20     71.1           20.6                4.7 +/-    1.84      10.2 +/-    1.84  0.030 / 0.030
G21     106.6          69.6                6.5 +/-    1.06       6.9 +/-    1.06  0.030 / 0.040
G24     96.7           27.2                9.1 +/-    1.15      16.8 +/-    1.15  0.070 / 0.140
G27     297.3          35.6                4.9 +/-    1.16       7.6 +/-    1.16  0.060 / 0.140
G32     211.5          33.8                6.2 +/-    2.09      10.1 +/-    2.09  0.090 / 0.070