PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/08-21:42:50
G02     61.0           32.7                9.8 +/-    1.28      16.2 +/-    1.28  0.050 / 0.100
G05     56.8           62.3               12.1 +/-    0.87      13.5 +/-    0.87  0.050 / 0.080
G12     183.9          28.1               16.9 +/-    1.22      30.9 +/-    1.22  0.060 / 0.100
G13     127.0          17.5               16.2 +/-    1.58      38.0 +/-    1.58  0.070 / 0.110
G15     163.4          13.7               20.7 +/-    2.52      53.2 +/-    2.52  0.060 / 0.080
G20     208.8          65.4               14.8 +/-    1.03      16.1 +/-    1.03  0.100 / 0.100
G21     273.8          19.6               14.8 +/-    1.06      32.9 +/-    1.06  0.100 / 0.280
G25     224.4          47.7               16.0 +/-    3.12      20.8 +/-    3.12  0.110 / 0.270
G29     332.4          60.1               11.7 +/-    0.28      13.2 +/-    0.28  0.020 / 0.040