PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/30-20:57:50
G08     303.4          21.4                9.3 +/-    1.40      19.8 +/-    1.40  0.070 / 0.100
G10     342.0          61.3                9.3 +/-    0.40      10.4 +/-    0.40  0.100 / 0.090
G14     221.7          37.4               15.6 +/-    2.39      23.7 +/-    2.39  0.060 / 0.110
G18     49.2           56.2               10.5 +/-    0.50      12.3 +/-    0.50  0.060 / 0.090
G21     138.9          48.0               11.2 +/-    1.52      14.4 +/-    1.52  0.040 / 0.070
G24     68.7           30.0               10.8 +/-    0.76      19.0 +/-    0.76  0.050 / 0.070
G27     265.4          36.1               13.1 +/-    0.90      20.3 +/-    0.90  0.030 / 0.050
G32     229.1          55.4               14.4 +/-    0.66      17.1 +/-    0.66  0.040 / 0.040