PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-14:58:00
G02     62.9           29.5                6.6 +/-    0.94      11.7 +/-    0.94  0.020 / 0.030
G05     54.8           61.0                6.8 +/-    0.45       7.6 +/-    0.45  0.030 / 0.030
G12     181.7          26.9                5.9 +/-    2.01      11.0 +/-    2.01  0.140 / 0.190
G13     123.1          17.7                8.3 +/-    1.23      19.3 +/-    1.23  0.090 / 0.180
G15     160.4          16.5                7.7 +/-    2.91      18.4 +/-    2.91  0.130 / 0.260
G21     275.0          19.4                6.9 +/-    1.35      15.5 +/-    1.35  0.120 / 0.280
G25     231.7          49.1                9.2 +/-    1.86      11.8 +/-    1.86  0.110 / 0.230
G29     330.9          57.7                5.9 +/-    0.71       6.8 +/-    0.71  0.110 / 0.240