PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/13-18:58:10
G02     51.0           40.1              -12.1 +/-    0.62     -17.5 +/-    0.62  0.040 / 0.070
G05     76.0           67.8               10.0 +/-    0.47      10.7 +/-    0.47  0.040 / 0.070
G12     186.3          42.8               11.0 +/-    1.71      15.3 +/-    1.71  0.060 / 0.060
G21     264.5          11.1                2.9 +/-   24.07       7.9 +/-   24.07  0.050 / 0.060
G25     253.3          56.7               10.1 +/-    0.82      11.9 +/-    0.82  0.050 / 0.090
G29     323.0          46.6                8.6 +/-    1.08      11.3 +/-    1.08  0.050 / 0.070