PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/10-20:57:50
G05     46.7           25.5               12.8 +/-    1.80      24.7 +/-    1.80  0.170 / 0.410
G13     84.5           37.4               16.7 +/-    0.61      25.4 +/-    0.61  0.150 / 0.530
G15     132.0          48.5               18.3 +/-    0.67      23.5 +/-    0.67  0.100 / 0.230
G18     240.9          38.1               15.7 +/-    1.24      23.6 +/-    1.24  0.130 / 0.230
G20     23.6           70.9               15.0 +/-    0.63      15.8 +/-    0.63  0.060 / 0.080
G21     308.9          44.7               15.0 +/-    0.68      20.3 +/-    0.68  0.070 / 0.060
G25     199.3          12.9               18.7 +/-    2.41      49.0 +/-    2.41  0.130 / 0.110
G26     295.8          19.3               13.9 +/-    1.78      31.2 +/-    1.78  0.120 / 0.120
G29     148.6          73.9               17.6 +/-    0.74      18.2 +/-    0.74  0.040 / 0.040