PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-05:12:30
G07     357.6          64.8                3.4 +/-    0.78       3.7 +/-    0.78  0.060 / 0.120
G08     75.1           51.1                6.7 +/-    1.32       8.4 +/-    1.32  0.060 / 0.110
G09     181.7          59.5               10.0 +/-    1.70      11.4 +/-    1.70  0.040 / 0.040
G11     136.6          21.1                6.9 +/-    1.03      14.9 +/-    1.03  0.030 / 0.040
G23     159.3          29.6                7.9 +/-    1.00      13.9 +/-    1.00  0.030 / 0.060
G27     44.4           22.7                1.9 +/-    1.35       3.9 +/-    1.35  0.030 / 0.060
G28     249.6          40.0                7.4 +/-    1.64      10.8 +/-    1.64  0.040 / 0.040
G30     313.0          44.4                2.7 +/-    1.16       3.7 +/-    1.16  0.050 / 0.060