PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-19:43:00
G10     262.7          37.1               10.6 +/-    2.18      16.3 +/-    2.18  0.050 / 0.040
G13     43.7           20.4                8.4 +/-    2.34      18.2 +/-    2.34  0.050 / 0.040
G15     64.5           52.0                9.9 +/-    0.70      12.2 +/-    0.70  0.230 / 0.240
G16     282.7          13.9                7.8 +/-    2.67      19.9 +/-    2.67  0.210 / 0.230
G20     291.5          59.0                9.2 +/-    0.97      10.6 +/-    0.97  0.040 / 0.030
G21     352.1          68.3               10.4 +/-    0.64      11.1 +/-    0.64  0.040 / 0.040
G24     125.7          11.5               12.9 +/-    2.95      34.9 +/-    2.95  0.150 / 0.470
G27     320.6          15.0                7.6 +/-    1.73      19.0 +/-    1.73  0.160 / 0.610
G29     166.7          36.7               10.1 +/-    1.09      15.5 +/-    1.09  0.120 / 0.210