PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-19:28:00
G08     303.8          21.2               14.4 +/-    2.20      30.8 +/-    2.20  0.080 / 0.080
G10     342.1          61.3               13.5 +/-    0.29      15.2 +/-    0.29  0.070 / 0.060
G14     221.7          37.0               18.0 +/-    1.47      27.5 +/-    1.47  0.040 / 0.060
G18     49.9           55.8               14.6 +/-    0.82      17.2 +/-    0.82  0.040 / 0.060
G21     138.9          46.8               18.0 +/-    0.42      23.6 +/-    0.42  0.060 / 0.060
G24     68.6           29.9               16.0 +/-    1.18      28.0 +/-    1.18  0.050 / 0.080
G27     265.5          36.1               16.2 +/-    1.46      25.2 +/-    1.46  0.090 / 0.070
G32     229.2          56.2               17.2 +/-    2.40      20.3 +/-    2.40  0.080 / 0.040