PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-17:43:10
G08     277.2          21.0                8.7 +/-    1.40      18.7 +/-    1.40  0.060 / 0.100
G10     41.7           61.8                8.3 +/-    0.71       9.3 +/-    0.71  0.120 / 0.160
G14     249.3          59.7               10.0 +/-    0.82      11.4 +/-    0.82  0.190 / 0.220
G18     83.8           40.3                8.5 +/-    0.91      12.3 +/-    0.91  0.190 / 0.180
G21     151.3          19.9               10.8 +/-    2.72      23.9 +/-    2.72  0.100 / 0.120
G24     44.7           17.4                8.0 +/-    2.10      18.8 +/-    2.10  0.100 / 0.130
G27     237.9          21.7               10.3 +/-    2.45      21.7 +/-    2.45  0.030 / 0.020
G31     180.9          20.3               13.9 +/-    2.30      30.3 +/-    2.30  0.020 / 0.020
G32     298.4          75.9               10.4 +/-    0.30      10.7 +/-    0.30  0.050 / 0.060