PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/12-10:43:10
G02     54.1           35.8                4.2 +/-    0.41       6.6 +/-    0.41  0.020 / 0.030
G05     77.7           68.7                5.2 +/-    0.30       5.5 +/-    0.30  0.020 / 0.030
G12     183.9          40.7                6.9 +/-    1.41       9.9 +/-    1.41  0.210 / 0.540
G21     265.3          12.7                3.5 +/-    2.99       9.1 +/-    2.99  0.230 / 0.630
G25     250.7          56.8                5.7 +/-    0.88       6.7 +/-    0.88  0.040 / 0.050
G29     322.3          45.7                4.2 +/-    1.31       5.6 +/-    1.31  0.040 / 0.040