PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-16:42:50
G02     57.9           34.0                8.0 +/-    0.94      13.0 +/-    0.94  0.030 / 0.030
G05     65.7           66.0                9.6 +/-    0.30      10.4 +/-    0.30  0.020 / 0.040
G12     186.5          35.9               10.7 +/-    1.12      16.8 +/-    1.12  0.100 / 0.310
G13     131.7          13.4               12.2 +/-    1.29      31.4 +/-    1.29  0.090 / 0.310
G15     164.7          10.3               -5.1 +/-   29.08     -14.0 +/-   29.08  0.060 / 0.080
G20     206.7          56.8               12.7 +/-    0.43      14.8 +/-    0.43  0.050 / 0.080
G21     269.9          17.9                9.7 +/-    1.75      22.5 +/-    1.75  0.040 / 0.060
G25     237.3          53.2               11.3 +/-    1.11      13.7 +/-    1.11  0.070 / 0.060
G29     331.3          57.4                8.9 +/-    0.95      10.4 +/-    0.95  0.030 / 0.060