PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-20:42:40
G05     53.0           10.9               13.1 +/-    3.86      35.8 +/-    3.86  0.120 / 0.260
G10     244.6          20.5               17.5 +/-    2.55      38.1 +/-    2.55  0.150 / 0.230
G13     62.5           34.9               15.5 +/-    0.90      24.7 +/-    0.90  0.130 / 0.260
G15     102.2          57.3               17.0 +/-    0.80      19.8 +/-    0.80  0.180 / 0.240
G16     306.5          13.4               13.0 +/-    1.29      33.6 +/-    1.29  0.050 / 0.040
G18     259.0          51.3               16.1 +/-    2.22      20.0 +/-    2.22  0.060 / 0.050
G20     37.6           54.9               14.9 +/-    0.86      17.8 +/-    0.86  0.040 / 0.040
G21     326.6          56.3               14.5 +/-    0.68      17.0 +/-    0.68  0.040 / 0.040
G26     279.0          17.5               15.7 +/-    0.77      36.8 +/-    0.77  0.240 / 0.290
G29     160.2          53.8               16.7 +/-    0.48      20.1 +/-    0.48  0.170 / 0.210