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                7.1 +/-    1.23      14.2 +/-    1.23  0.060 / 0.090
G10     12.8           62.9                3.9 +/-    0.78       4.4 +/-    0.78  0.070 / 0.090
G14     231.3          48.7                6.7 +/-    1.87       8.6 +/-    1.87  0.070 / 0.090
G18     317.5          14.1                6.3 +/-    4.19      16.1 +/-    4.19  0.080 / 0.110
G20     68.0           51.1                6.5 +/-    0.80       8.1 +/-    0.80  0.150 / 0.220
G21     146.9          35.5                8.3 +/-    0.69      13.1 +/-    0.69  0.180 / 0.120
G24     51.2           21.6                6.3 +/-    3.16      13.4 +/-    3.16  0.030 / 0.020
G27     255.3          30.9                7.5 +/-    2.60      12.8 +/-    2.60  0.030 / 0.020
G32     248.7          68.4                6.9 +/-    0.52       7.3 +/-    0.52  0.090 / 0.080