PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-02:28:10
G02     54.4           36.4                8.5 +/-    0.67      13.1 +/-    0.67  0.130 / 0.300
G05     68.7           65.1               10.7 +/-    0.38      11.7 +/-    0.38  0.130 / 0.260
G12     188.0          42.5               12.9 +/-    1.66      18.0 +/-    1.66  0.070 / 0.050
G13     132.4          10.4               -4.9 +/-   24.32     -13.7 +/-   24.32  0.050 / 0.050
G21     266.6          14.2               11.0 +/-    5.28      27.8 +/-    5.28  0.110 / 0.070
G25     246.9          56.1               11.9 +/-    0.92      14.0 +/-    0.92  0.070 / 0.060
G29     327.3          51.9               10.0 +/-    0.90      12.3 +/-    0.90  0.030 / 0.030