PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/17-07:12:40
G02     55.0           35.9                3.5 +/-    1.49       5.5 +/-    1.49  0.040 / 0.040
G05     68.5           65.4                4.3 +/-    0.69       4.6 +/-    0.69  0.040 / 0.060
G12     187.6          41.3                6.5 +/-    0.99       9.3 +/-    0.99  0.060 / 0.060
G13     132.2          10.9                3.5 +/-   12.69       9.5 +/-   12.69  0.050 / 0.070
G21     268.3          17.5                5.2 +/-    1.73      12.2 +/-    1.73  0.160 / 0.260
G25     241.2          55.7                6.5 +/-    2.89       7.7 +/-    2.89  0.250 / 0.220
G29     327.9          52.7                3.7 +/-    1.38       4.5 +/-    1.38  0.200 / 0.340