PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-18:12:30
G02     40.6           49.4               20.0 +/-    1.00      25.4 +/-    1.00  0.090 / 0.100
G05     131.8          67.9               23.4 +/-    0.36      25.1 +/-    0.36  0.080 / 0.150
G06     59.0           10.0               17.5 +/-    1.39      48.7 +/-    1.39  0.040 / 0.040
G12     192.3          57.6               23.7 +/-    0.67      27.5 +/-    0.67  0.040 / 0.040
G20     199.6          36.1               24.3 +/-    1.18      37.7 +/-    1.18  0.020 / 0.040
G25     275.2          59.6               22.7 +/-    1.58      25.9 +/-    1.58  0.030 / 0.040
G29     315.6          38.3               19.7 +/-    0.88      29.4 +/-    0.88  0.020 / 0.020