PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-20:43:00
G02     14.8           67.8                9.2 +/-    0.35       9.9 +/-    0.35  0.030 / 0.030
G05     158.2          49.3               12.1 +/-    2.51      15.4 +/-    2.51  0.030 / 0.030
G06     48.5           24.4                6.0 +/-   14.32      11.8 +/-   14.32  0.030 / 0.030
G12     223.5          77.9                9.7 +/-    0.33       9.9 +/-    0.33  0.030 / 0.020
G19     91.9           14.9                3.3 +/-   42.87       8.2 +/-   42.87  0.080 / 0.090
G20     197.0          16.5               18.4 +/-    4.18      44.0 +/-    4.18  0.110 / 0.090
G24     217.1          11.1               10.9 +/-   31.84      29.6 +/-   31.84  0.410 / 0.580
G25     307.0          49.6               10.8 +/-    2.03      13.6 +/-    2.03  0.400 / 0.530
G29     300.0          21.3               10.5 +/-    4.42      22.4 +/-    4.42  0.040 / 0.040