PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-21:42:50
G10     251.5          26.6               12.9 +/-    1.40      24.3 +/-    1.40  0.060 / 0.140
G13     53.8           30.9               11.3 +/-    1.73      19.4 +/-    1.73  0.120 / 0.140
G15     85.0           57.4               13.2 +/-    1.03      15.4 +/-    1.03  0.110 / 0.350
G16     297.8          14.0                9.4 +/-    1.81      24.0 +/-    1.81  0.130 / 0.250
G18     270.8          56.6               11.4 +/-    1.24      13.3 +/-    1.24  0.040 / 0.050
G20     43.8           47.2               11.2 +/-    1.00      14.6 +/-    1.00  0.030 / 0.040
G21     336.6          61.9               12.0 +/-    0.71      13.4 +/-    0.71  0.080 / 0.060
G26     270.2          14.9               11.9 +/-    1.77      29.7 +/-    1.77  0.060 / 0.050
G29     163.4          44.7               12.5 +/-    0.56      17.0 +/-    0.56  0.030 / 0.040