PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-20:27:50
G02     329.2          79.0                9.7 +/-    0.36       9.9 +/-    0.36  0.050 / 0.030
G05     166.4          33.2               21.4 +/-    8.78      35.1 +/-    8.78  0.050 / 0.030
G06     42.5           38.0              -12.3 +/-   16.89     -18.5 +/-   16.89  0.090 / 0.140
G12     306.0          74.7                9.2 +/-    0.70       9.5 +/-    0.70  0.130 / 0.150
G19     78.3           24.3              -36.6 +/-   51.22     -72.6 +/-   51.22  0.040 / 0.030
G24     228.4          22.0               11.8 +/-    2.24      24.7 +/-    2.24  0.040 / 0.030
G25     316.3          35.2               10.2 +/-    1.58      16.1 +/-    1.58  0.110 / 0.110
G29     288.2          10.9               -4.9 +/-   19.36     -13.5 +/-   19.36  0.090 / 0.090