PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/04-21:28:00
G10     254.0          29.6               11.9 +/-    0.99      21.1 +/-    0.99  0.040 / 0.060
G13     50.1           27.4                6.8 +/-    2.14      12.5 +/-    2.14  0.060 / 0.060
G15     85.4           59.1                8.6 +/-    0.71       9.9 +/-    0.71  0.160 / 0.620
G16     289.9          15.7                9.2 +/-    1.76      22.6 +/-    1.76  0.130 / 0.510
G20     254.5          13.8               11.3 +/-    0.82      29.0 +/-    0.82  0.110 / 0.200
G21     336.9          62.1                7.7 +/-    0.43       8.6 +/-    0.43  0.070 / 0.190
G26     262.6          14.1               12.3 +/-    1.25      31.2 +/-    1.25  0.030 / 0.040
G29     166.2          47.0                9.5 +/-    0.73      12.5 +/-    0.73  0.030 / 0.040