PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/04-21:28:00
G10     285.3          46.8               16.0 +/-    1.28      21.1 +/-    1.28  0.050 / 0.050
G15     48.2           35.4               13.4 +/-    0.84      21.1 +/-    0.84  0.050 / 0.050
G18     339.5          67.0               16.3 +/-    0.93      17.5 +/-    0.93  0.100 / 0.250
G20     65.6           23.5               14.4 +/-    0.93      29.2 +/-    0.93  0.100 / 0.230
G21     70.7           76.1               18.0 +/-    0.63      18.5 +/-    0.63  0.060 / 0.140
G24     107.4          22.8               17.9 +/-    2.08      36.9 +/-    2.08  0.060 / 0.190
G27     307.0          31.1               16.3 +/-    1.80      27.8 +/-    1.80  0.040 / 0.060
G29     166.5          11.1               19.5 +/-    4.62      53.2 +/-    4.62  0.040 / 0.060