PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-17:42:40
G08     300.3          21.8                5.1 +/-    1.31      10.7 +/-    1.31  0.060 / 0.090
G10     351.3          62.3                5.9 +/-    0.49       6.6 +/-    0.49  0.060 / 0.090
G14     224.7          40.4                7.2 +/-    1.59      10.5 +/-    1.59  0.060 / 0.080
G18     56.7           53.3                7.5 +/-    0.98       9.1 +/-    0.98  0.050 / 0.080
G21     141.7          41.5                8.2 +/-    0.61      11.7 +/-    0.61  0.070 / 0.040
G24     63.7           28.8                8.4 +/-    0.73      15.0 +/-    0.73  0.060 / 0.050
G27     260.4          34.6                7.5 +/-    2.14      12.1 +/-    2.14  0.100 / 0.100
G32     234.7          61.1                7.0 +/-    1.44       7.8 +/-    1.44  0.090 / 0.070