PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-16:27:40
G02     57.7           34.3                8.6 +/-    3.40      13.8 +/-    3.40  0.220 / 0.420
G05     61.9           64.4                8.2 +/-    0.63       9.0 +/-    0.63  0.130 / 0.430
G12     183.5          33.5                9.0 +/-    1.71      14.8 +/-    1.71  0.190 / 0.310
G13     127.6          14.1               10.7 +/-    2.15      27.3 +/-    2.15  0.180 / 0.350
G15     164.4          11.6                9.3 +/-   10.83      25.1 +/-   10.83  0.170 / 0.410
G21     270.5          15.8                7.9 +/-    2.68      19.2 +/-    2.68  0.270 / 0.410
G25     239.9          53.0                8.7 +/-    3.87      10.5 +/-    3.87  0.030 / 0.030
G29     327.4          52.7                8.7 +/-    0.76      10.6 +/-    0.76  0.030 / 0.030