PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/05-09:28:00
G07     326.6          55.5                5.7 +/-    0.56       6.8 +/-    0.56  0.040 / 0.050
G08     107.2          49.0                9.5 +/-    0.54      12.1 +/-    0.54  0.040 / 0.050
G09     194.4          79.0                8.1 +/-    0.28       8.2 +/-    0.28  0.080 / 0.120
G16     44.4           15.3                4.7 +/-    1.36      11.6 +/-    1.36  0.080 / 0.100
G23     153.2          51.1               10.2 +/-    0.78      12.6 +/-    0.78  0.030 / 0.040
G27     61.3           33.9                6.4 +/-    1.30      10.3 +/-    1.30  0.040 / 0.040
G28     232.4          24.3                9.2 +/-    3.64      18.3 +/-    3.64  0.040 / 0.040
G30     295.5          29.1                5.5 +/-    1.84       9.8 +/-    1.84  0.050 / 0.050