PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-15:58:00
G02     56.7           34.9                8.1 +/-    0.76      12.9 +/-    0.76  0.040 / 0.040
G05     68.9           66.8               10.0 +/-    0.38      10.8 +/-    0.38  0.030 / 0.040
G12     187.0          38.0               10.7 +/-    1.48      16.1 +/-    1.48  0.070 / 0.080
G13     132.9          12.1               14.4 +/-    2.32      38.2 +/-    2.32  0.070 / 0.080
G20     206.0          54.5               11.4 +/-    0.61      13.7 +/-    0.61  0.130 / 0.360
G21     268.7          17.2               10.6 +/-    3.29      25.1 +/-    3.29  0.100 / 0.390
G25     240.9          54.4               11.0 +/-    0.73      13.2 +/-    0.73  0.040 / 0.060
G29     330.5          56.2                9.1 +/-    0.70      10.7 +/-    0.70  0.040 / 0.060