PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-17:27:40
G08     289.4          23.9                7.5 +/-    1.20      15.0 +/-    1.20  0.040 / 0.090
G10     12.8           62.9                5.8 +/-    0.47       6.4 +/-    0.47  0.060 / 0.110
G14     231.3          48.7               10.0 +/-    1.07      12.8 +/-    1.07  0.030 / 0.030
G18     317.5          14.1                5.9 +/-    2.04      14.9 +/-    2.04  0.030 / 0.040
G20     68.0           51.1                6.9 +/-    0.38       8.6 +/-    0.38  0.060 / 0.080
G21     146.9          35.5                8.9 +/-    0.89      14.0 +/-    0.89  0.060 / 0.080
G24     51.2           21.6                4.9 +/-    1.36      10.4 +/-    1.36  0.110 / 0.140
G27     255.3          30.9                9.1 +/-    1.64      15.6 +/-    1.64  0.100 / 0.120
G32     248.7          68.4                8.3 +/-    1.19       8.9 +/-    1.19  0.090 / 0.100