PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-22:27:50
G02     62.2           32.0                9.0 +/-    0.79      15.1 +/-    0.79  0.040 / 0.040
G05     54.1           60.0                8.1 +/-    0.30       9.2 +/-    0.30  0.030 / 0.040
G12     183.3          25.9               14.5 +/-    1.41      27.8 +/-    1.41  0.060 / 0.080
G13     125.5          18.8               13.0 +/-    1.18      29.4 +/-    1.18  0.040 / 0.090
G15     162.8          14.9               18.7 +/-    1.67      46.5 +/-    1.67  0.060 / 0.150
G20     209.9          67.6               10.8 +/-    0.78      11.5 +/-    0.78  0.060 / 0.120
G21     275.1          20.5               10.4 +/-    1.71      22.6 +/-    1.71  0.090 / 0.270
G25     222.5          46.1               11.7 +/-    0.87      15.6 +/-    0.87  0.100 / 0.300
G29     333.3          61.5               10.1 +/-    0.96      11.3 +/-    0.96  0.030 / 0.030