PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-12:13:10
G02     350.9          78.1                3.9 +/-    0.31       4.0 +/-    0.31  0.050 / 0.070
G05     165.4          33.1                5.8 +/-    1.68       9.6 +/-    1.68  0.050 / 0.070
G06     40.7           43.9                2.4 +/-    1.17       3.3 +/-    1.17  0.230 / 0.210
G12     311.3          70.0                4.2 +/-    0.52       4.5 +/-    0.52  0.260 / 0.170
G17     87.5           9.7                 5.9 +/-    5.71      16.5 +/-    5.71  0.030 / 0.030
G19     76.5           25.8                4.3 +/-    2.19       8.3 +/-    2.19  0.020 / 0.020
G24     229.4          22.8                5.9 +/-    2.58      12.1 +/-    2.58  0.440 / 0.430
G25     317.2          30.2                3.9 +/-    1.78       6.9 +/-    1.78  0.230 / 0.190
G29     288.6          13.3                6.1 +/-    1.61      15.8 +/-    1.61  0.040 / 0.040