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               14.0 +/-    1.46      25.0 +/-    1.46  0.040 / 0.050
G13     50.6           27.8                9.2 +/-    1.06      16.9 +/-    1.06  0.040 / 0.060
G15     85.7           58.9               11.4 +/-    0.59      13.1 +/-    0.59  0.140 / 0.550
G16     290.7          15.8               10.5 +/-    2.61      25.7 +/-    2.61  0.140 / 0.510
G20     256.5          20.9                7.3 +/-    0.76      15.6 +/-    0.76  0.060 / 0.160
G21     336.2          61.7               10.9 +/-    0.59      12.3 +/-    0.59  0.080 / 0.150
G26     263.2          14.4               13.3 +/-    1.84      33.7 +/-    1.84  0.030 / 0.050
G29     166.1          47.6               13.4 +/-    0.94      17.4 +/-    0.94  0.020 / 0.040