PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/13-18:27:00
G02     38.7           50.2              -13.9 +/-    0.59     -17.5 +/-    0.59  0.030 / 0.060
G05     120.6          68.1               11.0 +/-    0.73      11.7 +/-    0.73  0.030 / 0.060
G12     191.5          58.8               10.9 +/-    1.43      12.5 +/-    1.43  0.060 / 0.070
G25     282.9          57.0                9.6 +/-    1.00      11.2 +/-    1.00  0.050 / 0.070
G29     313.4          34.7                9.3 +/-    1.49      14.9 +/-    1.49  0.060 / 0.070