PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-17:42:40
G08     274.4          21.7                7.2 +/-    2.50      15.1 +/-    2.50  0.070 / 0.180
G10     43.8           61.0                7.1 +/-    0.45       8.0 +/-    0.45  0.070 / 0.170
G14     249.2          60.6                6.7 +/-    0.65       7.6 +/-    0.65  0.030 / 0.030
G18     315.3          26.8                4.3 +/-    1.63       8.0 +/-    1.63  0.030 / 0.040
G20     85.7           42.6                7.9 +/-    0.63      11.0 +/-    0.63  0.050 / 0.070
G21     152.0          21.3                7.3 +/-    1.32      15.6 +/-    1.32  0.060 / 0.050
G24     41.9           13.0                6.3 +/-    1.46      16.4 +/-    1.46  0.080 / 0.160
G27     241.7          22.7                6.4 +/-    2.59      13.2 +/-    2.59  0.090 / 0.160
G31     182.7          18.0                8.9 +/-    2.64      20.5 +/-    2.64  0.120 / 0.220
G32     295.5          75.8                7.4 +/-    0.72       7.6 +/-    0.72  0.120 / 0.260