PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-09:12:20
G08     90.6           51.6                5.5 +/-    1.06       6.8 +/-    1.06  0.060 / 0.070
G09     182.3          68.5                5.2 +/-    0.36       5.5 +/-    0.36  0.080 / 0.080
G11     142.0          14.9                5.7 +/-    2.23      14.2 +/-    2.23  0.100 / 0.080
G23     157.0          40.4                5.6 +/-    0.69       8.1 +/-    0.69  0.050 / 0.060
G27     51.6           29.1                3.9 +/-    1.51       7.0 +/-    1.51  0.120 / 0.070
G28     240.1          32.4                5.5 +/-    2.08       9.2 +/-    2.08  0.080 / 0.120
G30     303.5          35.8                4.4 +/-    1.42       6.9 +/-    1.42  0.060 / 0.040