PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-20:28:00
G02     10.0           70.1               12.2 +/-    0.90      12.9 +/-    0.90  0.030 / 0.040
G05     160.4          46.1               15.1 +/-    1.18      20.1 +/-    1.18  0.030 / 0.030
G06     47.1           26.9                8.9 +/-    0.96      16.7 +/-    0.96  0.090 / 0.180
G12     240.3          79.7               10.7 +/-    1.18      10.8 +/-    1.18  0.120 / 0.220
G19     89.3           16.7               10.3 +/-    1.55      24.7 +/-    1.55  0.120 / 0.460
G20     197.0          13.7               16.9 +/-    4.20      43.5 +/-    4.20  0.130 / 0.490
G24     219.2          13.1               15.2 +/-    2.53      39.6 +/-    2.53  0.080 / 0.090
G25     309.6          47.2               12.2 +/-    1.73      16.0 +/-    1.73  0.060 / 0.080
G29     297.8          19.3               10.2 +/-    1.73      22.9 +/-    1.73  0.040 / 0.060