PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-18:58:00
G08     276.5          21.0               11.6 +/-    1.55      24.9 +/-    1.55  0.080 / 0.130
G10     41.9           61.8                8.3 +/-    0.72       9.3 +/-    0.72  0.210 / 0.180
G11     317.0          10.6               -3.7 +/-   14.35     -10.1 +/-   14.35  0.180 / 0.210
G14     249.9          60.2               11.3 +/-    0.57      12.8 +/-    0.57  0.210 / 0.150
G18     83.8           40.5                8.4 +/-    1.20      12.1 +/-    1.20  0.110 / 0.130
G24     44.7           17.4                7.7 +/-    2.25      18.1 +/-    2.25  0.100 / 0.130
G27     237.7          21.5               12.1 +/-    1.39      25.6 +/-    1.39  0.020 / 0.020
G31     181.4          19.8               12.8 +/-    1.41      28.3 +/-    1.41  0.020 / 0.020
G32     297.0          75.6               10.4 +/-    0.36      10.7 +/-    0.36  0.040 / 0.050