PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/13-16:43:00
G02     52.0           39.1               12.3 +/-    0.64      18.1 +/-    0.64  0.040 / 0.070
G05     85.3           70.1               13.0 +/-    0.51      13.7 +/-    0.51  0.070 / 0.080
G12     188.2          43.8               16.0 +/-    1.77      22.0 +/-    1.77  0.030 / 0.030
G20     203.5          48.9               16.3 +/-    1.06      20.9 +/-    1.06  0.030 / 0.030
G21     264.2          13.2               13.4 +/-    3.48      34.7 +/-    3.48  0.040 / 0.050
G25     249.9          57.3               14.5 +/-    1.26      16.9 +/-    1.26  0.050 / 0.060
G29     325.7          50.5               11.5 +/-    0.91      14.4 +/-    0.91  0.180 / 0.410