PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-00:12:30
G02     253.6          78.8               10.8 +/-    0.51      11.0 +/-    0.51  0.050 / 0.050
G05     169.8          19.1               15.8 +/-    2.20      35.6 +/-    2.20  0.050 / 0.060
G06     39.2           58.8                9.4 +/-    0.29      10.8 +/-    0.29  0.080 / 0.130
G12     320.7          51.8               10.8 +/-    1.20      13.3 +/-    1.20  0.080 / 0.140
G17     73.1           20.0                9.5 +/-    0.89      20.9 +/-    0.89  0.140 / 0.480
G19     59.6           36.6                9.5 +/-    0.49      14.6 +/-    0.49  0.120 / 0.430
G24     241.0          32.9               14.5 +/-    0.81      24.0 +/-    0.81  0.040 / 0.040
G25     316.8          15.2                9.4 +/-    1.78      23.2 +/-    1.78  0.050 / 0.040