PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/15-14:27:50
G02     52.6           38.2                6.2 +/-    0.57       9.4 +/-    0.57  0.030 / 0.030
G05     81.5           69.0                9.1 +/-    0.59       9.7 +/-    0.59  0.020 / 0.040
G12     188.6          44.2               11.4 +/-    1.68      15.5 +/-    1.68  0.040 / 0.060
G20     204.2          47.9               13.3 +/-    1.25      17.2 +/-    1.25  0.050 / 0.060
G21     264.7          14.6                7.7 +/-    1.63      19.5 +/-    1.63  0.100 / 0.270
G25     252.0          57.2                9.2 +/-    1.17      10.7 +/-    1.17  0.140 / 0.260
G29     326.1          50.9                6.3 +/-    0.93       7.9 +/-    0.93  0.030 / 0.070