PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/21-17:57:30
G08     289.6          22.8                5.3 +/-    0.93      10.9 +/-    0.93  0.070 / 0.120
G10     14.5           63.2                7.5 +/-    0.46       8.3 +/-    0.46  0.090 / 0.080
G14     233.8          49.9                8.3 +/-    2.11      10.5 +/-    2.11  0.150 / 0.170
G18     70.1           47.6                6.5 +/-    1.17       8.4 +/-    1.17  0.120 / 0.110
G21     147.1          31.3                7.2 +/-    1.56      12.2 +/-    1.56  0.030 / 0.030
G24     53.6           24.6                6.3 +/-    3.62      12.4 +/-    3.62  0.030 / 0.030
G27     248.9          29.3                7.6 +/-    1.72      13.5 +/-    1.72  0.110 / 0.110
G32     254.3          70.0                6.5 +/-    0.53       6.9 +/-    0.53  0.110 / 0.090