PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-21:12:50
G01     319.8          15.2                8.6 +/-    1.84      21.4 +/-    1.84  0.280 / 0.370
G08     259.7          14.7               17.9 +/-    1.53      44.8 +/-    1.53  0.320 / 0.430
G10     73.8           55.6                8.3 +/-    0.52       9.9 +/-    0.52  0.130 / 0.440
G11     305.8          21.7                7.6 +/-    1.78      16.1 +/-    1.78  0.140 / 0.350
G14     288.9          70.2               10.1 +/-    0.62      10.7 +/-    0.62  0.060 / 0.090
G18     99.5           30.2               11.9 +/-    0.88      20.8 +/-    0.88  0.050 / 0.080
G27     225.1          10.4                7.9 +/-   27.86      21.9 +/-   27.86  0.060 / 0.060
G31     179.3          35.9               12.7 +/-    2.34      19.8 +/-    2.34  0.050 / 0.040
G32     355.4          70.5                9.3 +/-    0.88       9.8 +/-    0.88  0.040 / 0.030