PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/02-23:27:40
G02     253.4          78.7                9.0 +/-    0.49       9.2 +/-    0.49  0.030 / 0.030
G05     169.8          19.1               15.0 +/-    2.25      33.8 +/-    2.25  0.040 / 0.040
G06     39.4           58.2                9.4 +/-    0.59      10.8 +/-    0.59  0.120 / 0.390
G12     320.7          51.8               11.0 +/-    1.30      13.6 +/-    1.30  0.150 / 0.460
G17     73.0           20.3                9.9 +/-    0.95      21.7 +/-    0.95  0.100 / 0.140
G19     59.8           36.4                9.3 +/-    0.41      14.3 +/-    0.41  0.130 / 0.130
G24     241.2          33.0               12.4 +/-    1.43      20.5 +/-    1.43  0.070 / 0.090
G25     316.8          15.0                7.8 +/-    2.39      19.5 +/-    2.39  0.070 / 0.090