PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-17:28:10
G10     259.5          35.1               11.9 +/-    1.77      18.8 +/-    1.77  0.190 / 0.170
G13     45.6           22.6                6.4 +/-    2.19      13.2 +/-    2.19  0.110 / 0.240
G15     67.3           52.7                8.4 +/-    0.94      10.2 +/-    0.94  0.180 / 0.580
G16     285.5          14.8                6.6 +/-    2.03      16.5 +/-    2.03  0.140 / 0.370
G20     287.0          58.0                8.9 +/-    1.67      10.2 +/-    1.67  0.060 / 0.040
G21     347.5          66.3               10.0 +/-    0.69      10.8 +/-    0.69  0.040 / 0.040
G26     259.6          11.4                9.5 +/-   16.22      25.8 +/-   16.22  0.080 / 0.180
G27     321.5          12.6                3.6 +/-   15.35       9.6 +/-   15.35  0.100 / 0.150
G29     166.2          40.5               10.2 +/-    0.94      14.7 +/-    0.94  0.030 / 0.030