PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-20:43:10
G10     258.0          32.6               13.6 +/-    2.16      22.7 +/-    2.16  0.160 / 0.370
G13     46.9           24.6               12.0 +/-    0.85      23.6 +/-    0.85  0.050 / 0.050
G15     78.5           58.6               12.9 +/-    0.79      14.8 +/-    0.79  0.040 / 0.060
G16     287.0          14.6               10.0 +/-    2.33      25.1 +/-    2.33  0.120 / 0.430
G20     281.7          55.8               13.5 +/-    1.02      16.0 +/-    1.02  0.120 / 0.410
G21     345.4          65.9               11.1 +/-    0.74      12.0 +/-    0.74  0.060 / 0.200
G26     260.2          12.1               13.2 +/-    2.76      35.1 +/-    2.76  0.070 / 0.210
G27     322.1          10.7              -12.2 +/-   28.45     -33.5 +/-   28.45  0.020 / 0.030
G29     166.7          41.4               14.6 +/-    1.03      20.8 +/-    1.03  0.030 / 0.040