PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/20-21:43:10
G10     263.9          35.6               17.1 +/-    0.91      26.8 +/-    0.91  0.060 / 0.080
G13     44.0           22.0               12.6 +/-    1.24      26.5 +/-    1.24  0.090 / 0.110
G15     62.6           50.9               16.1 +/-    1.10      20.1 +/-    1.10  0.040 / 0.030
G16     285.2          12.0               13.8 +/-    1.75      36.9 +/-    1.75  0.040 / 0.030
G18     295.1          63.4               16.3 +/-    0.93      18.0 +/-    0.93  0.240 / 0.270
G20     52.8           36.6               14.0 +/-    0.89      21.7 +/-    0.89  0.200 / 0.300
G21     0.3            70.9               17.2 +/-    0.59      18.1 +/-    0.59  0.120 / 0.210
G24     123.8          12.3               21.1 +/-    4.46      56.1 +/-    4.46  0.110 / 0.240
G27     319.0          18.1               13.9 +/-    1.21      32.0 +/-    1.21  0.220 / 0.110
G29     165.9          30.0               18.2 +/-    2.14      31.8 +/-    2.14  0.110 / 0.170