PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/17-18:43:10
G02     51.3           39.9                7.5 +/-    2.26      10.9 +/-    2.26  0.040 / 0.070
G05     74.7           67.6               10.5 +/-    0.66      11.2 +/-    0.66  0.060 / 0.070
G12     186.1          42.0                9.6 +/-    0.59      13.5 +/-    0.59  0.110 / 0.310
G21     265.0          11.4               -0.6 +/-   19.94      -1.7 +/-   19.94  0.250 / 0.500
G25     252.2          56.5                8.7 +/-    1.47      10.2 +/-    1.47  0.040 / 0.060
G29     323.4          47.1                9.5 +/-    0.60      12.4 +/-    0.60  0.050 / 0.060