PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-16:57:40
G08     290.0          23.9                8.7 +/-    1.37      17.4 +/-    1.37  0.050 / 0.110
G10     11.5           62.9                8.0 +/-    0.59       8.9 +/-    0.59  0.050 / 0.110
G14     230.8          48.2               11.6 +/-    0.96      15.0 +/-    0.96  0.070 / 0.090
G18     317.5          13.8                8.5 +/-    2.60      21.7 +/-    2.60  0.060 / 0.070
G20     67.2           51.5                9.1 +/-    0.34      11.3 +/-    0.34  0.030 / 0.030
G21     146.6          35.7               11.1 +/-    1.14      17.4 +/-    1.14  0.030 / 0.030
G24     51.8           22.0                7.9 +/-    1.16      16.4 +/-    1.16  0.090 / 0.110
G27     256.1          31.2               10.2 +/-    1.54      17.5 +/-    1.54  0.100 / 0.090
G32     247.1          67.7                9.6 +/-    0.86      10.3 +/-    0.86  0.070 / 0.120