PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-21:28:10
G02     22.2           63.5               13.7 +/-    1.17      15.2 +/-    1.17  0.040 / 0.060
G05     152.4          55.6               17.0 +/-    0.52      20.2 +/-    0.52  0.040 / 0.060
G06     51.4           19.5               10.0 +/-    1.41      22.3 +/-    1.41  0.090 / 0.160
G12     204.1          72.4               15.0 +/-    0.84      15.7 +/-    0.84  0.090 / 0.160
G19     96.7           11.3               12.8 +/-    1.25      34.6 +/-    1.25  0.040 / 0.050
G20     197.1          22.3               22.1 +/-    1.07      46.1 +/-    1.07  0.040 / 0.050
G25     300.4          53.8               16.1 +/-    1.18      19.4 +/-    1.18  0.030 / 0.040
G29     304.1          25.1               15.5 +/-    1.59      30.2 +/-    1.59  0.040 / 0.040