PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/04-22:28:00
G10     254.7          29.1               22.1 +/-    1.14      39.4 +/-    1.14  0.040 / 0.040
G13     50.6           28.7               16.8 +/-    0.55      30.3 +/-    0.55  0.040 / 0.060
G15     78.4           56.5               19.2 +/-    1.02      22.6 +/-    1.02  0.120 / 0.250
G16     293.9          13.9               17.3 +/-    1.78      44.2 +/-    1.78  0.100 / 0.270
G18     276.4          58.5               20.5 +/-    1.04      23.6 +/-    1.04  0.070 / 0.330
G20     46.4           43.9               16.7 +/-    0.68      22.9 +/-    0.68  0.080 / 0.330
G21     341.2          64.2               19.4 +/-    0.63      21.2 +/-    0.63  0.040 / 0.080
G26     266.4          13.5               21.0 +/-    2.26      54.1 +/-    2.26  0.040 / 0.070
G27     322.0          10.4              -11.9 +/-   29.74     -33.0 +/-   29.74  0.150 / 0.420
G29     164.5          41.0               24.4 +/-    1.43      34.9 +/-    1.43  0.070 / 0.190