PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-16:42:50
G08     317.2          14.0                6.4 +/-    2.28      16.2 +/-    2.28  0.090 / 0.070
G10     313.7          56.2                6.0 +/-    1.47       7.1 +/-    1.47  0.070 / 0.070
G14     213.9          21.9                8.8 +/-    1.50      18.5 +/-    1.50  0.070 / 0.090
G15     45.6           17.3                7.2 +/-    1.73      17.0 +/-    1.73  0.090 / 0.090
G18     25.6           62.2                7.4 +/-    1.89       8.3 +/-    1.89  0.190 / 0.340
G20     78.3           13.7                6.9 +/-    2.59      17.7 +/-    2.59  0.080 / 0.340
G21     123.8          60.5                9.1 +/-    0.40      10.3 +/-    0.40  0.070 / 0.040
G24     86.4           29.8                8.1 +/-    1.57      14.3 +/-    1.57  0.070 / 0.050
G27     285.8          37.8                6.8 +/-    2.42      10.2 +/-    2.42  0.080 / 0.160
G32     216.5          42.2                8.0 +/-    1.04      11.2 +/-    1.04  0.190 / 0.280