PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/11-18:57:40
G05     47.8           21.3               17.1 +/-    1.16      36.5 +/-    1.16  0.080 / 0.240
G10     235.1          10.1              -16.4 +/-   30.92     -45.6 +/-   30.92  0.090 / 0.210
G13     80.1           37.4               23.4 +/-    0.96      35.6 +/-    0.96  0.040 / 0.080
G15     126.4          50.9               27.5 +/-    0.98      34.3 +/-    0.98  0.050 / 0.070
G18     243.9          41.3               27.5 +/-    0.69      39.2 +/-    0.69  0.060 / 0.160
G20     25.3           68.7               23.1 +/-    0.42      24.6 +/-    0.42  0.070 / 0.160
G21     312.8          47.6               21.4 +/-    1.63      27.8 +/-    1.63  0.040 / 0.050
G25     198.7          11.1               28.4 +/-    2.80      77.5 +/-    2.80  0.040 / 0.040
G26     294.2          18.8               16.6 +/-    1.59      37.5 +/-    1.59  0.160 / 0.320
G29     150.9          68.7               26.6 +/-    1.19      28.3 +/-    1.19  0.260 / 0.460