PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-22:28:00
G10     253.4          29.1               15.0 +/-    2.39      26.8 +/-    2.39  0.050 / 0.040
G13     50.6           27.8                9.2 +/-    2.13      16.9 +/-    2.13  0.060 / 0.050
G15     85.7           58.9               11.5 +/-    0.76      13.2 +/-    0.76  0.110 / 0.290
G16     290.7          15.8               10.5 +/-    1.84      25.6 +/-    1.84  0.140 / 0.430
G20     256.5          20.9                6.9 +/-    3.42      14.8 +/-    3.42  0.160 / 0.200
G21     336.2          61.7               11.3 +/-    0.57      12.6 +/-    0.57  0.110 / 0.170
G26     263.2          14.4               13.4 +/-    2.87      33.8 +/-    2.87  0.030 / 0.030
G29     166.1          47.6               12.3 +/-    0.61      16.1 +/-    0.61  0.030 / 0.040