PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-20:12:30
G02     32.9           56.0               11.5 +/-    0.72      13.6 +/-    0.72  0.040 / 0.050
G05     144.5          62.6               14.2 +/-    0.62      15.7 +/-    0.62  0.040 / 0.050
G06     55.5           13.9                8.4 +/-    2.34      21.4 +/-    2.34  0.040 / 0.040
G12     195.4          64.3               11.3 +/-    1.11      12.4 +/-    1.11  0.030 / 0.040
G20     198.1          29.9               14.0 +/-    2.70      24.5 +/-    2.70  0.040 / 0.040
G25     286.6          58.7               12.5 +/-    1.02      14.4 +/-    1.02  0.030 / 0.040
G29     310.2          31.8               10.0 +/-    1.26      16.9 +/-    1.26  0.100 / 0.100