PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-16:43:00
G01     320.4          13.6                5.2 +/-    1.99      13.4 +/-    1.99  0.180 / 0.450
G08     263.5          15.5                6.7 +/-    1.48      16.5 +/-    1.48  0.170 / 0.390
G10     70.9           56.3                7.5 +/-    0.55       8.8 +/-    0.55  0.150 / 0.310
G11     308.8          19.1                5.6 +/-    0.55      12.5 +/-    0.55  0.120 / 0.270
G14     280.1          68.4                7.2 +/-    0.81       7.7 +/-    0.81  0.070 / 0.080
G18     98.4           30.4                7.6 +/-    1.45      13.3 +/-    1.45  0.060 / 0.070
G27     226.6          11.7                8.9 +/-    1.39      24.0 +/-    1.39  0.030 / 0.030
G31     177.4          36.4                9.9 +/-    1.02      15.4 +/-    1.02  0.030 / 0.030
G32     356.5          70.8                7.5 +/-    0.33       7.9 +/-    0.33  0.030 / 0.040