PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-21:28:10
G02     39.9           50.3                9.5 +/-    0.76      12.0 +/-    0.76  0.030 / 0.030
G05     123.6          69.0               11.4 +/-    0.32      12.1 +/-    0.32  0.040 / 0.050
G12     189.5          54.4               10.9 +/-    0.47      13.1 +/-    0.47  0.030 / 0.040
G20     199.4          38.8               12.6 +/-    1.19      18.7 +/-    1.19  0.030 / 0.050
G25     268.1          60.6               10.3 +/-    1.45      11.7 +/-    1.45  0.050 / 0.050
G29     315.6          37.9                9.8 +/-    0.78      14.8 +/-    0.78  0.040 / 0.040