PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/29-16:57:50
G02     35.8           53.5               17.9 +/-    1.86      21.6 +/-    1.86  0.040 / 0.040
G05     142.4          63.4               17.2 +/-    0.45      19.0 +/-    0.45  0.060 / 0.050
G06     55.3           14.8               12.0 +/-    1.63      29.9 +/-    1.63  0.030 / 0.030
G12     197.4          64.7               13.5 +/-    0.55      14.7 +/-    0.55  0.050 / 0.030
G20     198.8          29.5               15.4 +/-    2.03      27.3 +/-    2.03  0.190 / 0.190
G25     288.6          57.3               14.9 +/-    1.14      17.4 +/-    1.14  0.160 / 0.150
G29     311.8          34.2               11.5 +/-    0.82      18.6 +/-    0.82  0.030 / 0.030