PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-19:57:40
G08     293.9          23.0               19.4 +/-    1.49      39.8 +/-    1.49  0.130 / 0.120
G10     3.2            63.0                8.6 +/-    1.31       9.5 +/-    1.31  0.120 / 0.080
G14     229.2          46.1               11.7 +/-    2.33      15.5 +/-    2.33  0.050 / 0.080
G18     63.3           50.8                9.7 +/-    0.64      12.1 +/-    0.64  0.050 / 0.080
G21     144.9          37.2               12.5 +/-    0.50      19.0 +/-    0.50  0.080 / 0.110
G24     58.2           27.0                8.4 +/-    0.79      15.6 +/-    0.79  0.070 / 0.100
G27     254.0          32.0               10.5 +/-    2.30      17.7 +/-    2.30  0.040 / 0.030
G32     243.0          65.0               10.8 +/-    0.60      11.8 +/-    0.60  0.050 / 0.030