PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/01-03:58:10
G05     46.5           22.3                2.7 +/-    0.86       5.7 +/-    0.86  0.040 / 0.080
G13     85.2           35.3                5.5 +/-    1.03       8.7 +/-    1.03  0.040 / 0.090
G15     133.0          47.1                7.8 +/-    1.26      10.3 +/-    1.26  0.140 / 0.280
G20     241.6          31.1                7.3 +/-    2.35      12.5 +/-    2.35  0.120 / 0.250
G21     307.3          43.0                6.1 +/-    1.71       8.4 +/-    1.71  0.060 / 0.120
G25     202.9          17.3                5.9 +/-    2.40      13.9 +/-    2.40  0.050 / 0.120
G26     298.0          19.0                6.6 +/-    1.06      14.8 +/-    1.06  0.040 / 0.110
G29     139.3          77.0                7.2 +/-    0.70       7.4 +/-    0.70  0.040 / 0.130