PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/18-18:13:10
G02     251.5          77.1                8.7 +/-    0.37       8.9 +/-    0.37  0.100 / 0.150
G05     170.4          18.9               10.5 +/-    1.55      23.6 +/-    1.55  0.110 / 0.150
G06     39.8           54.8                8.4 +/-    0.59      10.0 +/-    0.59  0.040 / 0.050
G12     320.9          53.7                8.2 +/-    0.79       9.9 +/-    0.79  0.050 / 0.040
G17     71.8           22.7                7.0 +/-    1.63      14.4 +/-    1.63  0.110 / 0.360
G19     60.9           35.2                8.4 +/-    0.98      13.3 +/-    0.98  0.100 / 0.360
G24     242.3          32.7               10.2 +/-    1.52      17.0 +/-    1.52  0.070 / 0.110
G25     316.8          14.2                7.2 +/-    3.36      18.2 +/-    3.36  0.100 / 0.130