PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-20:42:50
G02     52.3           38.7                8.1 +/-    1.31      12.0 +/-    1.31  0.190 / 0.410
G05     72.7           66.7                9.5 +/-    0.54      10.2 +/-    0.54  0.060 / 0.060
G12     186.9          42.5               10.2 +/-    0.72      14.2 +/-    0.72  0.050 / 0.060
G13     132.8          9.8                -6.3 +/-   14.88     -17.6 +/-   14.88  0.090 / 0.080
G25     251.6          56.5                8.4 +/-    1.91       9.9 +/-    1.91  0.060 / 0.070
G29     324.0          47.9                9.1 +/-    0.91      11.8 +/-    0.91  0.030 / 0.030