PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/13-21:28:00
G02     59.8           32.5                8.7 +/-    1.83      14.5 +/-    1.83  0.090 / 0.090
G05     56.1           59.8               10.2 +/-    0.91      11.6 +/-    0.91  0.080 / 0.080
G12     185.0          32.9               10.4 +/-    1.11      17.2 +/-    1.11  0.060 / 0.080
G13     125.9          15.7               10.6 +/-    2.98      25.8 +/-    2.98  0.060 / 0.100
G15     162.7          13.6               12.2 +/-    3.40      31.5 +/-    3.40  0.230 / 0.400
G21     272.4          17.4               13.1 +/-    1.35      30.8 +/-    1.35  0.220 / 0.270
G25     236.1          51.4               10.8 +/-    2.70      13.4 +/-    2.70  0.170 / 0.370
G29     330.4          56.5               11.5 +/-    0.44      13.5 +/-    0.44  0.200 / 0.410