PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/08-21:12:40
G02     50.0           41.8                5.7 +/-   26.72       8.0 +/-   26.72  0.150 / 0.520
G05     88.0           70.8               12.7 +/-    0.88      13.4 +/-    0.88  0.160 / 0.600
G12     186.6          42.3               17.6 +/-    5.72      24.7 +/-    5.72  0.060 / 0.070
G20     202.5          50.6               16.5 +/-    6.52      20.6 +/-    6.52  0.040 / 0.070
G21     263.4          11.4               13.2 +/-   16.59      35.7 +/-   16.59  0.050 / 0.050
G25     244.0          57.4               13.9 +/-    6.89      16.1 +/-    6.89  0.040 / 0.040
G29     323.3          47.6               12.3 +/-    1.11      16.0 +/-    1.11  0.030 / 0.070