PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-20:42:40
G02     29.3           58.5               10.0 +/-    0.61      11.5 +/-    0.61  0.030 / 0.040
G05     142.6          60.3               11.0 +/-    1.52      12.5 +/-    1.52  0.030 / 0.060
G06     53.1           15.9                8.3 +/-    1.56      20.1 +/-    1.56  0.030 / 0.040
G12     194.1          68.0                9.7 +/-    1.11      10.4 +/-    1.11  0.030 / 0.050
G19     97.3           13.5               11.0 +/-    0.68      28.4 +/-    0.68  0.030 / 0.060
G25     299.7          52.3                9.8 +/-    1.02      12.0 +/-    1.02  0.040 / 0.060
G29     305.2          25.2               10.1 +/-    2.66      19.7 +/-    2.66  0.050 / 0.050