PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-16:28:10
G02     207.8          43.4               16.9 +/-    0.80      23.4 +/-    0.80  0.090 / 0.160
G06     128.4          78.4               13.6 +/-    0.60      13.9 +/-    0.60  0.080 / 0.170
G12     313.5          24.4               12.7 +/-    1.73      25.3 +/-    1.73  0.030 / 0.060
G17     48.0           39.1               11.0 +/-    0.60      16.2 +/-    0.60  0.030 / 0.060
G19     24.8           56.9               12.6 +/-    0.84      14.8 +/-    0.84  0.090 / 0.080
G24     286.8          41.1               11.7 +/-    1.67      16.7 +/-    1.67  0.070 / 0.100
G28     112.8          23.3               11.3 +/-    1.39      22.9 +/-    1.39  0.030 / 0.030