PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-21:58:10
G02     53.1           39.4               10.9 +/-    0.66      15.9 +/-    0.66  0.050 / 0.090
G05     74.4           68.6               11.3 +/-    0.74      12.1 +/-    0.74  0.080 / 0.080
G12     185.4          37.6               14.4 +/-    1.54      21.8 +/-    1.54  0.030 / 0.070
G13     133.9          11.3               10.1 +/-   24.44      27.3 +/-   24.44  0.030 / 0.040
G20     203.9          55.3               14.7 +/-    0.89      17.5 +/-    0.89  0.190 / 0.320
G21     266.4          13.8               14.2 +/-    2.58      36.3 +/-    2.58  0.110 / 0.330
G25     236.8          54.9               14.1 +/-    0.80      16.8 +/-    0.80  0.040 / 0.050
G29     325.8          51.0               12.3 +/-    1.41      15.3 +/-    1.41  0.030 / 0.060