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              -17.4 +/-   19.62     -48.0 +/-   19.62  0.170 / 0.300
G08     265.7          17.2                8.0 +/-    1.10      18.9 +/-    1.10  0.150 / 0.450
G10     64.2           58.1                8.6 +/-    0.82       9.9 +/-    0.82  0.090 / 0.340
G11     310.7          17.9                7.2 +/-    2.16      16.7 +/-    2.16  0.090 / 0.100
G14     272.2          67.4                8.3 +/-    0.75       8.9 +/-    0.75  0.060 / 0.070
G18     94.8           33.4                9.1 +/-    1.70      14.9 +/-    1.70  0.020 / 0.020
G24     39.4           9.5                 7.1 +/-    2.40      20.1 +/-    2.40  0.030 / 0.020
G27     229.1          14.1                9.0 +/-    1.03      22.8 +/-    1.03  0.040 / 0.040
G31     179.1          31.2               10.6 +/-    1.42      18.1 +/-    1.42  0.030 / 0.040
G32     342.7          73.2                8.5 +/-    0.44       8.9 +/-    0.44  0.040 / 0.020