PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-21:57:40
G02     51.1           41.0                8.4 +/-    0.78      12.1 +/-    0.78  0.050 / 0.060
G05     80.7           69.7               10.6 +/-    0.72      11.2 +/-    0.72  0.040 / 0.080
G12     185.9          40.0               12.6 +/-    0.71      18.3 +/-    0.71  0.310 / 0.520
G13     135.6          9.8                -6.4 +/-   14.53     -17.8 +/-   14.53  0.320 / 0.410
G20     203.0          52.8              -87.8 +/-   32.50    -107.1 +/-   32.50  0.040 / 0.070
G21     264.7          12.4               13.6 +/-    4.11      36.0 +/-    4.11  0.050 / 0.060
G25     240.7          56.4               11.5 +/-    1.53      13.6 +/-    1.53  0.040 / 0.040
G29     324.2          48.9               10.4 +/-    0.76      13.3 +/-    0.76  0.040 / 0.060