PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-15:58:10
G02     45.1           45.1               10.0 +/-    0.58      13.5 +/-    0.58  0.020 / 0.030
G05     113.8          70.0               12.3 +/-    0.75      13.0 +/-    0.75  0.030 / 0.030
G12     191.3          53.6               14.3 +/-    2.02      17.3 +/-    2.02  0.060 / 0.050
G20     201.0          39.5               13.3 +/-    1.84      19.6 +/-    1.84  0.040 / 0.050
G25     268.7          59.2               13.7 +/-    1.00      15.6 +/-    1.00  0.050 / 0.100
G29     319.7          43.3                9.7 +/-    1.36      13.4 +/-    1.36  0.040 / 0.100