PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-01:57:50
G08     294.6          23.3                9.3 +/-    0.68      19.0 +/-    0.68  0.030 / 0.030
G10     358.6          62.8               10.9 +/-    0.86      12.1 +/-    0.86  0.030 / 0.030
G14     227.8          45.6               13.9 +/-    1.91      18.6 +/-    1.91  0.030 / 0.020
G18     58.4           53.5               11.8 +/-    0.39      14.3 +/-    0.39  0.030 / 0.020
G21     144.4          42.7               12.3 +/-    0.77      17.1 +/-    0.77  0.040 / 0.070
G24     60.2           27.8               10.0 +/-    2.04      18.3 +/-    2.04  0.050 / 0.070
G27     255.8          32.9               12.4 +/-    2.27      20.4 +/-    2.27  0.080 / 0.130
G32     239.9          63.4               11.9 +/-    1.09      13.2 +/-    1.09  0.080 / 0.100