PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-21:27:30
G02     63.2           30.9               10.0 +/-    1.46      17.2 +/-    1.46  0.060 / 0.120
G05     54.0           60.4                9.1 +/-    0.53      10.3 +/-    0.53  0.080 / 0.140
G12     183.5          25.7               13.6 +/-    1.20      26.1 +/-    1.20  0.050 / 0.080
G13     125.1          19.1               11.9 +/-    1.87      26.7 +/-    1.87  0.040 / 0.100
G15     161.9          15.7               15.3 +/-    1.67      37.3 +/-    1.67  0.110 / 0.290
G20     210.6          68.0               13.7 +/-    0.67      14.7 +/-    0.67  0.090 / 0.260
G21     275.8          21.1               11.1 +/-    2.13      23.8 +/-    2.13  0.040 / 0.050
G25     222.2          45.7               13.2 +/-    2.29      17.6 +/-    2.29  0.020 / 0.050
G29     334.4          62.7               10.8 +/-    0.59      12.0 +/-    0.59  0.030 / 0.040