PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-19:27:50
G02     25.7           61.4               11.9 +/-    0.73      13.3 +/-    0.73  0.030 / 0.030
G05     154.6          55.3               13.9 +/-    0.45      16.5 +/-    0.45  0.030 / 0.030
G06     51.5           19.6                8.3 +/-    2.14      18.5 +/-    2.14  0.050 / 0.050
G12     206.0          72.3               12.5 +/-    0.79      13.1 +/-    0.79  0.040 / 0.050
G19     97.3           11.0               12.2 +/-    1.67      33.4 +/-    1.67  0.040 / 0.030
G20     197.4          22.6               16.0 +/-    2.29      33.2 +/-    2.29  0.030 / 0.040
G25     299.4          54.3                9.4 +/-    2.30      11.3 +/-    2.30  0.070 / 0.130
G29     305.2          26.7               12.4 +/-    1.34      23.3 +/-    1.34  0.050 / 0.110