PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-20:42:50
G02     4.4            72.2               12.7 +/-    0.49      13.3 +/-    0.49  0.030 / 0.030
G05     161.6          43.7               16.4 +/-    1.27      22.5 +/-    1.27  0.030 / 0.030
G06     46.1           28.9               10.8 +/-    1.74      19.3 +/-    1.74  0.020 / 0.020
G12     255.2          80.3               14.8 +/-    1.01      15.0 +/-    1.01  0.020 / 0.020
G19     87.3           18.2               -8.3 +/-   61.96     -19.0 +/-   61.96  0.060 / 0.060
G20     197.0          11.5                9.5 +/-   34.58      25.5 +/-   34.58  0.060 / 0.070
G24     220.9          14.8               17.1 +/-    1.61      42.8 +/-    1.61  0.150 / 0.310
G25     311.5          44.8               13.8 +/-    0.88      18.7 +/-    0.88  0.190 / 0.330
G29     295.9          17.5               15.1 +/-    2.09      35.4 +/-    2.09  0.080 / 0.140