PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-22:28:00
G02     56.0           37.1               10.3 +/-    0.99      15.8 +/-    0.99  0.050 / 0.050
G05     65.1           65.9               12.3 +/-    0.30      13.3 +/-    0.30  0.060 / 0.070
G12     184.6          33.3               15.9 +/-    0.90      26.0 +/-    0.90  0.030 / 0.040
G13     131.1          13.8               14.8 +/-    3.32      38.0 +/-    3.32  0.040 / 0.030
G20     205.5          59.6               16.3 +/-    0.93      18.6 +/-    0.93  0.140 / 0.470
G21     269.3          16.0               15.8 +/-    2.92      38.4 +/-    2.92  0.190 / 0.490
G25     231.5          52.2               13.2 +/-    0.92      16.2 +/-    0.92  0.040 / 0.040
G29     328.1          54.4               11.8 +/-    0.74      14.1 +/-    0.74  0.040 / 0.040