PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/22-18:12:30
G02     286.1          80.4                6.9 +/-    0.49       7.0 +/-    0.49  0.110 / 0.140
G05     167.8          25.2               11.1 +/-    1.40      21.7 +/-    1.40  0.110 / 0.160
G06     39.8           47.8                7.5 +/-    0.93       9.7 +/-    0.93  0.080 / 0.140
G12     319.4          61.1                6.9 +/-    1.23       7.7 +/-    1.23  0.100 / 0.170
G17     77.4           18.8                7.8 +/-    2.52      17.7 +/-    2.52  0.220 / 0.330
G19     67.5           30.9                8.0 +/-    2.14      13.8 +/-    2.14  0.170 / 0.330
G24     235.8          28.4               10.0 +/-    1.34      18.2 +/-    1.34  0.070 / 0.080
G25     317.4          20.3                5.5 +/-    1.90      12.0 +/-    1.90  0.060 / 0.090