PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-17:57:50
G02     43.0           46.8                7.5 +/-    0.57       9.9 +/-    0.57  0.040 / 0.060
G05     105.1          69.9               10.4 +/-    0.91      11.0 +/-    0.91  0.040 / 0.060
G12     188.6          52.5               10.7 +/-    1.10      13.1 +/-    1.10  0.050 / 0.050
G25     272.0          58.1                9.6 +/-    0.48      11.1 +/-    0.48  0.050 / 0.060
G29     316.9          38.8                8.6 +/-    0.99      12.8 +/-    0.99  0.030 / 0.040