PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-22:12:20
G02     45.6           45.7               10.5 +/-    0.76      14.0 +/-    0.76  0.040 / 0.060
G05     99.8           70.8               12.4 +/-    0.61      13.1 +/-    0.61  0.040 / 0.080
G12     187.0          46.5               13.9 +/-    0.72      18.3 +/-    0.72  0.040 / 0.060
G20     201.0          46.2               12.1 +/-    0.73      16.0 +/-    0.73  0.050 / 0.060
G25     253.4          59.3               11.3 +/-    0.98      12.9 +/-    0.98  0.040 / 0.040
G29     320.0          43.3               11.8 +/-    1.11      16.3 +/-    1.11  0.050 / 0.040