PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-21:28:00
G08     295.4          23.0               12.0 +/-    1.55      24.7 +/-    1.55  0.080 / 0.090
G10     359.0          62.8               11.5 +/-    0.47      12.8 +/-    0.47  0.080 / 0.100
G14     227.7          44.9               17.0 +/-    0.80      23.0 +/-    0.80  0.060 / 0.110
G18     60.4           52.2               12.1 +/-    0.71      14.9 +/-    0.71  0.060 / 0.120
G21     144.1          40.2               15.7 +/-    1.61      22.8 +/-    1.61  0.050 / 0.090
G24     60.1           27.8               10.5 +/-    0.88      19.2 +/-    0.88  0.060 / 0.100
G27     255.9          32.9               14.8 +/-    0.84      24.4 +/-    0.84  0.030 / 0.030
G32     239.4          62.6               15.4 +/-    0.76      17.2 +/-    0.76  0.030 / 0.030