PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-19:42:30
G02     267.9          79.7                9.5 +/-    0.48       9.6 +/-    0.48  0.210 / 0.400
G05     168.8          22.1               12.5 +/-    2.30      26.0 +/-    2.30  0.380 / 0.220
G06     39.5           52.2               10.2 +/-    0.83      12.6 +/-    0.83  0.040 / 0.030
G12     320.4          56.5                8.2 +/-    0.68       9.7 +/-    0.68  0.030 / 0.030
G17     74.9           20.0                8.3 +/-    2.78      18.3 +/-    2.78  0.090 / 0.100
G19     63.9           33.4                8.3 +/-    1.77      13.5 +/-    1.77  0.130 / 0.130
G24     238.8          30.7               10.2 +/-    2.28      17.6 +/-    2.28  0.040 / 0.050
G25     317.2          17.2                9.4 +/-    2.10      22.1 +/-    2.10  0.030 / 0.060