PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-20:12:30
G02     313.2          80.0               14.3 +/-    0.46      14.5 +/-    0.46  0.030 / 0.020
G05     167.8          30.1               18.2 +/-    1.50      31.8 +/-    1.50  0.030 / 0.030
G06     41.7           40.9               11.3 +/-    1.09      16.3 +/-    1.09  0.030 / 0.030
G12     312.2          71.6               14.6 +/-    0.55      15.2 +/-    0.55  0.030 / 0.030
G17     86.7           9.7                12.0 +/-    2.60      33.6 +/-    2.60  0.120 / 0.120
G19     75.5           26.2               12.7 +/-    1.90      24.2 +/-    1.90  0.100 / 0.120
G24     230.9          24.1               17.4 +/-    2.13      34.7 +/-    2.13  0.260 / 0.310
G25     317.0          32.4               12.6 +/-    1.76      21.0 +/-    1.76  0.160 / 0.320