PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-19:28:00
G08     308.8          19.3               12.6 +/-    1.95      28.1 +/-    1.95  0.060 / 0.090
G10     331.2          59.8               10.2 +/-    0.53      11.6 +/-    0.53  0.080 / 0.080
G14     218.4          31.8               12.8 +/-    1.17      21.6 +/-    1.17  0.040 / 0.060
G18     41.3           58.5               10.8 +/-    0.47      12.4 +/-    0.47  0.040 / 0.060
G21     134.4          52.4               13.5 +/-    0.74      16.6 +/-    0.74  0.050 / 0.090
G24     75.0           30.6               12.9 +/-    0.52      22.4 +/-    0.52  0.050 / 0.090
G27     272.7          37.5               12.3 +/-    1.38      18.7 +/-    1.38  0.050 / 0.060
G32     223.8          50.7               13.9 +/-    1.05      17.4 +/-    1.05  0.040 / 0.050