PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-19:28:00
G02     64.9           28.8                9.4 +/-    1.03      16.9 +/-    1.03  0.040 / 0.050
G05     52.9           59.8               10.3 +/-    0.32      11.7 +/-    0.32  0.040 / 0.050
G12     183.9          25.2               14.2 +/-    1.59      27.5 +/-    1.59  0.070 / 0.140
G13     124.3          19.9               14.5 +/-    1.65      32.0 +/-    1.65  0.090 / 0.150
G15     160.3          17.3               16.0 +/-    2.23      37.6 +/-    2.23  0.060 / 0.090
G20     212.2          68.6               14.7 +/-    0.63      15.6 +/-    0.63  0.040 / 0.090
G21     277.2          22.6               12.0 +/-    0.99      24.9 +/-    0.99  0.030 / 0.040
G25     222.9          45.2               11.5 +/-    1.45      15.5 +/-    1.45  0.030 / 0.030
G29     337.1          65.1               10.5 +/-    1.19      11.4 +/-    1.19  0.090 / 0.250