PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-14:57:30
G01     319.3          17.2                5.8 +/-    1.82      13.6 +/-    1.82  0.110 / 0.270
G08     260.7          13.5                5.3 +/-    1.55      13.8 +/-    1.55  0.110 / 0.200
G10     78.2           54.0                7.3 +/-    0.72       8.8 +/-    0.72  0.040 / 0.060
G11     306.1          20.7                5.9 +/-    1.08      12.8 +/-    1.08  0.060 / 0.050
G14     290.4          69.4                7.5 +/-    0.40       7.9 +/-    0.40  0.040 / 0.040
G22     300.6          11.4                2.4 +/-    7.23       6.4 +/-    7.23  0.030 / 0.040
G31     175.6          41.8               11.5 +/-    0.82      16.2 +/-    0.82  0.170 / 0.310
G32     7.7            67.5                6.0 +/-    0.54       6.5 +/-    0.54  0.150 / 0.220