PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-05:28:00
G03     234.2          65.7                6.6 +/-    0.56       7.2 +/-    0.56  0.040 / 0.040
G07     251.0          11.4               -0.9 +/-   17.78      -2.6 +/-   17.78  0.040 / 0.050
G09     306.6          23.4                4.8 +/-    1.14       9.7 +/-    1.14  0.060 / 0.060
G14     103.7          10.3                5.0 +/-    2.92      14.0 +/-    2.92  0.060 / 0.050
G16     125.7          61.8                7.1 +/-    0.47       7.9 +/-    0.47  0.080 / 0.270
G22     193.0          51.8                7.0 +/-    0.44       8.7 +/-    0.44  0.120 / 0.270
G23     321.2          50.9                5.3 +/-    0.90       6.6 +/-    0.90  0.040 / 0.040
G26     66.9           52.5                5.5 +/-    0.85       6.7 +/-    0.85  0.040 / 0.040
G31     53.5           18.8                2.6 +/-    3.18       5.8 +/-    3.18  0.250 / 0.480