PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-18:57:40
G01     321.0          10.6              -15.9 +/-   28.63     -43.7 +/-   28.63  0.260 / 0.300
G08     265.7          17.2                8.5 +/-    2.73      20.1 +/-    2.73  0.260 / 0.350
G10     64.2           58.1                8.0 +/-    0.61       9.2 +/-    0.61  0.130 / 0.350
G11     310.7          17.9                6.8 +/-    2.02      15.8 +/-    2.02  0.120 / 0.400
G14     272.2          67.4                8.3 +/-    0.76       8.9 +/-    0.76  0.080 / 0.110
G18     94.8           33.4                8.5 +/-    1.03      14.0 +/-    1.03  0.040 / 0.090
G27     229.1          14.1                9.2 +/-    4.17      23.3 +/-    4.17  0.030 / 0.040
G31     179.1          31.2               11.2 +/-    2.95      19.2 +/-    2.95  0.020 / 0.030
G32     342.7          73.2                8.7 +/-    0.44       9.1 +/-    0.44  0.040 / 0.050