PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-12:42:40
G02     59.2           32.2                4.5 +/-    1.02       7.6 +/-    1.02  0.030 / 0.020
G05     61.5           63.0                6.7 +/-    0.55       7.5 +/-    0.55  0.030 / 0.030
G12     186.8          35.8                9.0 +/-    1.16      14.1 +/-    1.16  0.070 / 0.060
G13     130.8          13.8                4.8 +/-    3.35      12.4 +/-    3.35  0.070 / 0.100
G15     163.6          11.2               -0.3 +/-   15.26      -0.8 +/-   15.26  0.250 / 0.350
G20     208.2          55.3               10.9 +/-    0.48      12.9 +/-    0.48  0.220 / 0.400
G21     271.7          20.9                7.5 +/-    3.11      16.1 +/-    3.11  0.100 / 0.060
G25     239.3          53.0               10.3 +/-    4.60      12.5 +/-    4.60  0.100 / 0.050
G29     330.6          56.7                5.7 +/-    0.41       6.7 +/-    0.41  0.050 / 0.070