PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-03:12:50
G02     52.6           37.8                5.7 +/-    1.31       8.6 +/-    1.31  0.180 / 0.260
G05     74.0           66.5                7.9 +/-    0.56       8.5 +/-    0.56  0.180 / 0.400
G12     188.7          45.0               10.3 +/-    0.84      13.9 +/-    0.84  0.060 / 0.040
G21     265.0          13.2                8.0 +/-    5.40      20.7 +/-    5.40  0.070 / 0.060
G25     250.6          57.2                7.9 +/-    1.61       9.2 +/-    1.61  0.050 / 0.060
G29     326.1          50.4                7.5 +/-    1.30       9.4 +/-    1.30  0.060 / 0.060