PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-23:27:40
G08     306.9          20.4               11.4 +/-    2.04      24.9 +/-    2.04  0.030 / 0.020
G10     333.2          60.1               10.9 +/-    0.45      12.3 +/-    0.45  0.030 / 0.030
G14     219.1          33.8               16.5 +/-    1.73      26.8 +/-    1.73  0.060 / 0.060
G15     47.1           9.8                 9.3 +/-    4.30      26.0 +/-    4.30  0.060 / 0.060
G18     41.0           58.8               13.2 +/-    0.99      15.1 +/-    0.99  0.090 / 0.100
G21     135.4          54.0               15.8 +/-    0.45      19.1 +/-    0.45  0.130 / 0.100
G24     73.7           30.5               13.1 +/-    0.72      22.7 +/-    0.72  0.060 / 0.080
G27     270.8          37.3               14.1 +/-    3.21      21.4 +/-    3.21  0.050 / 0.070
G32     224.9          50.7               15.2 +/-    2.19      19.0 +/-    2.19  0.030 / 0.050