PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/08-19:57:40
G02     88.7           12.3               12.3 +/-    1.92      32.6 +/-    1.92  0.050 / 0.100
G05     45.8           27.0               10.0 +/-    2.03      18.7 +/-    2.03  0.060 / 0.110
G13     87.8           35.6               13.7 +/-    0.69      21.5 +/-    0.69  0.060 / 0.130
G15     144.1          43.4               15.7 +/-    0.59      21.6 +/-    0.59  0.060 / 0.130
G20     240.2          29.5               11.8 +/-    1.14      20.9 +/-    1.14  0.080 / 0.120
G21     304.4          40.8               12.4 +/-    1.13      17.9 +/-    1.13  0.070 / 0.130
G25     202.7          17.6               12.8 +/-    1.58      29.8 +/-    1.58  0.120 / 0.380
G26     296.6          20.3               11.7 +/-    1.54      25.6 +/-    1.54  0.130 / 0.250
G29     137.6          83.9               12.6 +/-    0.66      12.6 +/-    0.66  0.040 / 0.060