PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/16-19:58:10
G13     43.8           20.5                8.6 +/-    2.44      18.7 +/-    2.44  0.050 / 0.040
G15     64.9           52.3               10.1 +/-    1.01      12.4 +/-    1.01  0.050 / 0.050
G16     282.9          14.0                9.1 +/-    1.78      23.2 +/-    1.78  0.190 / 0.300
G20     291.0          58.8               11.0 +/-    1.35      12.6 +/-    1.35  0.130 / 0.200
G21     351.7          68.2               10.6 +/-    0.63      11.3 +/-    0.63  0.030 / 0.040
G24     125.7          11.4               18.0 +/-    2.79      48.7 +/-    2.79  0.040 / 0.050
G27     320.7          14.9                8.2 +/-    2.12      20.5 +/-    2.12  0.120 / 0.460
G29     166.6          36.8               13.1 +/-    1.60      20.1 +/-    1.60  0.170 / 0.520