PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/09-20:57:20
G02     45.9           45.2               12.2 +/-    0.72      16.4 +/-    0.72  0.040 / 0.060
G05     105.3          71.2               14.5 +/-    0.72      15.2 +/-    0.72  0.050 / 0.070
G12     187.9          47.7               14.7 +/-    1.29      19.0 +/-    1.29  0.040 / 0.050
G20     201.0          45.3               14.5 +/-    0.66      19.5 +/-    0.66  0.040 / 0.060
G25     254.0          59.5               15.3 +/-    0.99      17.5 +/-    0.99  0.040 / 0.040
G29     320.1          43.4               12.5 +/-    0.99      17.3 +/-    0.99  0.050 / 0.040