PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-17:13:10
G08     317.6          13.8                7.0 +/-    1.41      17.9 +/-    1.41  0.050 / 0.090
G10     312.4          55.9                7.7 +/-    0.66       9.1 +/-    0.66  0.050 / 0.080
G14     213.5          21.3               13.5 +/-    2.08      28.7 +/-    2.08  0.060 / 0.120
G15     45.5           18.1                6.9 +/-    0.76      16.0 +/-    0.76  0.060 / 0.100
G18     23.9           62.6                8.3 +/-    0.39       9.2 +/-    0.39  0.050 / 0.060
G20     77.8           13.9                7.0 +/-    2.94      17.9 +/-    2.94  0.040 / 0.070
G21     123.0          60.6               14.2 +/-    1.51      16.0 +/-    1.51  0.080 / 0.210
G24     87.4           29.7                8.5 +/-    1.05      15.1 +/-    1.05  0.090 / 0.220
G27     286.8          37.8                9.9 +/-    1.31      15.0 +/-    1.31  0.030 / 0.040
G32     216.1          41.2               13.5 +/-    0.86      19.3 +/-    0.86  0.040 / 0.040