PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-19:27:50
G02     64.9           28.8               11.1 +/-    1.09      20.0 +/-    1.09  0.140 / 0.080
G05     52.9           59.8               11.5 +/-    0.67      13.1 +/-    0.67  0.120 / 0.100
G12     183.9          25.2               14.5 +/-    2.10      28.2 +/-    2.10  0.110 / 0.130
G13     124.3          19.9               15.3 +/-    1.57      33.8 +/-    1.57  0.120 / 0.120
G15     160.3          17.3               16.1 +/-    0.91      37.8 +/-    0.91  0.040 / 0.030
G20     212.2          68.6               12.6 +/-    0.55      13.4 +/-    0.55  0.030 / 0.030
G21     277.2          22.6               12.7 +/-    2.01      26.3 +/-    2.01  0.030 / 0.030
G25     222.9          45.2               11.9 +/-    2.02      16.0 +/-    2.02  0.030 / 0.030
G29     337.1          65.1               11.6 +/-    0.66      12.7 +/-    0.66  0.180 / 0.220