PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-09:58:10
G07     331.1          57.2                5.1 +/-    0.40       6.0 +/-    0.40  0.030 / 0.020
G08     102.4          50.1                7.4 +/-    0.51       9.3 +/-    0.51  0.030 / 0.020
G09     187.2          75.7                6.3 +/-    0.31       6.5 +/-    0.31  0.030 / 0.040
G11     146.3          10.6               -2.3 +/-   12.90      -6.4 +/-   12.90  0.030 / 0.050
G16     45.3           12.7                3.3 +/-    1.30       8.7 +/-    1.30  0.060 / 0.060
G23     154.4          47.9                7.7 +/-    0.61      10.0 +/-    0.61  0.040 / 0.080
G27     58.2           32.7                4.7 +/-    1.06       7.8 +/-    1.06  0.040 / 0.040
G28     234.5          26.7                6.1 +/-    2.18      11.4 +/-    2.18  0.040 / 0.050
G30     297.7          30.9                5.1 +/-    1.53       8.8 +/-    1.53  0.110 / 0.100