PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/15-17:57:40
G02     29.8           57.3                7.8 +/-    1.20       9.1 +/-    1.20  0.040 / 0.040
G05     141.4          61.6               11.3 +/-    0.47      12.6 +/-    0.47  0.030 / 0.040
G06     53.4           15.3                7.6 +/-    1.90      18.8 +/-    1.90  0.130 / 0.210
G12     199.8          69.0                8.7 +/-    0.47       9.3 +/-    0.47  0.120 / 0.220
G25     298.3          52.4                9.4 +/-    2.72      11.5 +/-    2.72  0.050 / 0.040
G29     306.8          27.7                9.0 +/-    1.44      16.6 +/-    1.44  0.060 / 0.060