PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-20:12:40
G01     304.5          34.8                9.1 +/-    1.12      14.5 +/-    1.12  0.060 / 0.140
G10     108.8          38.6               12.1 +/-    0.62      18.0 +/-    0.62  0.060 / 0.150
G11     279.5          28.1                8.5 +/-    1.17      15.5 +/-    1.17  0.070 / 0.110
G14     3.2            65.5                8.2 +/-    0.46       9.0 +/-    0.46  0.060 / 0.110
G18     119.4          10.7               13.7 +/-    2.68      37.7 +/-    2.68  0.090 / 0.210
G22     310.5          27.6                6.9 +/-    1.28      12.7 +/-    1.28  0.090 / 0.220
G25     79.1           17.3               10.0 +/-    1.36      23.6 +/-    1.36  0.040 / 0.050
G31     167.5          66.9               10.9 +/-    1.19      11.7 +/-    1.19  0.040 / 0.040
G32     38.3           51.1               10.3 +/-    0.42      12.8 +/-    0.42  0.050 / 0.040