PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/03-19:27:20
G02     51.4           40.2               17.0 +/-    0.86      24.6 +/-    0.86  0.040 / 0.040
G05     90.7           71.7               21.9 +/-    0.42      23.0 +/-    0.42  0.050 / 0.050
G12     187.2          42.3               24.5 +/-    1.00      34.3 +/-    1.00  0.040 / 0.060
G20     203.1          50.7               26.4 +/-    0.66      33.0 +/-    0.66  0.060 / 0.050
G21     264.1          12.4               22.0 +/-   15.03      58.2 +/-   15.03  0.250 / 0.500
G25     245.4          57.1               22.9 +/-    1.01      26.7 +/-    1.01  0.220 / 0.490
G29     324.5          49.2               20.0 +/-    0.84      25.5 +/-    0.84  0.030 / 0.020