PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-20:43:00
G10     257.5          32.3               13.0 +/-    1.63      21.7 +/-    1.63  0.040 / 0.040
G13     47.2           24.9               11.0 +/-    2.49      21.7 +/-    2.49  0.040 / 0.050
G15     79.4           58.7               12.0 +/-    1.00      13.8 +/-    1.00  0.130 / 0.440
G16     287.4          14.7                8.7 +/-    2.16      21.8 +/-    2.16  0.140 / 0.340
G20     281.0          55.5               11.0 +/-    2.02      13.0 +/-    2.02  0.260 / 0.200
G21     344.6          65.5               11.6 +/-    0.58      12.6 +/-    0.58  0.110 / 0.190
G26     260.6          12.3               12.8 +/-    1.69      33.9 +/-    1.69  0.120 / 0.150
G27     322.2          10.4              -13.8 +/-   16.89     -38.3 +/-   16.89  0.030 / 0.040
G29     166.6          41.9               13.1 +/-    0.84      18.5 +/-    0.84  0.030 / 0.040