PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-21:27:50
G02     78.0           18.9                9.9 +/-    1.59      22.3 +/-    1.59  0.120 / 0.320
G05     44.7           43.6               11.2 +/-    0.91      15.4 +/-    0.91  0.090 / 0.300
G13     108.2          30.6               15.7 +/-    0.70      27.2 +/-    0.70  0.130 / 0.140
G15     150.8          31.6               17.9 +/-    1.22      30.3 +/-    1.22  0.110 / 0.100
G18     227.4          21.2               20.6 +/-    3.17      44.0 +/-    3.17  0.050 / 0.050
G20     275.3          86.0               12.2 +/-    0.59      12.2 +/-    0.59  0.080 / 0.050
G21     291.2          32.3               12.2 +/-    2.29      20.5 +/-    2.29  0.020 / 0.020
G25     208.9          29.3               18.6 +/-    1.04      33.0 +/-    1.04  0.020 / 0.020
G26     313.1          14.6               -1.9 +/-   32.15      -4.8 +/-   32.15  0.030 / 0.040
G29     1.1            81.8               11.6 +/-    0.65      11.7 +/-    0.65  0.030 / 0.040