PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/28-21:57:40
G10     254.5          30.0               12.0 +/-    1.18      21.0 +/-    1.18  0.050 / 0.060
G13     49.6           27.0               10.1 +/-    1.42      18.9 +/-    1.42  0.060 / 0.060
G15     83.6           58.8               10.6 +/-    0.51      12.2 +/-    0.51  0.140 / 0.450
G16     289.4          15.6                8.6 +/-    2.46      21.0 +/-    2.46  0.120 / 0.650
G20     256.0          17.7                6.1 +/-    0.66      14.2 +/-    0.66  0.070 / 0.190
G21     337.8          62.5               10.6 +/-    0.42      11.8 +/-    0.42  0.070 / 0.170
G26     262.0          13.8               11.4 +/-    1.03      29.2 +/-    1.03  0.030 / 0.050
G29     166.3          46.2               13.4 +/-    0.97      17.8 +/-    0.97  0.030 / 0.040