PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-19:57:30
G10     257.5          32.3               11.3 +/-    3.00      18.8 +/-    3.00  0.150 / 0.310
G13     47.2           24.8                9.0 +/-    1.06      17.7 +/-    1.06  0.130 / 0.290
G15     78.4           58.3                9.9 +/-    0.74      11.4 +/-    0.74  0.120 / 0.360
G16     287.6          14.7                8.4 +/-    2.10      21.0 +/-    2.10  0.180 / 0.390
G20     281.1          55.5               11.0 +/-    0.80      13.0 +/-    0.80  0.040 / 0.050
G21     345.2          65.7                8.1 +/-    0.85       8.8 +/-    0.85  0.040 / 0.050
G26     260.8          12.2                9.3 +/-    1.90      24.6 +/-    1.90  0.090 / 0.240
G27     322.3          10.2              -16.4 +/-   10.73     -45.5 +/-   10.73  0.070 / 0.290
G29     166.5          41.7               11.2 +/-    1.35      15.8 +/-    1.35  0.030 / 0.050