PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-05:12:30
G01     318.3          19.1                5.3 +/-    1.80      12.0 +/-    1.80  0.040 / 0.020
G08     254.6          12.5                8.9 +/-    1.26      23.5 +/-    1.26  0.030 / 0.010
G10     80.5           53.6                5.2 +/-    1.56       6.2 +/-    1.56  0.040 / 0.010
G11     300.0          25.7                4.8 +/-    1.69       9.2 +/-    1.69  0.040 / 0.010
G14     306.2          71.6                5.1 +/-    0.70       5.3 +/-    0.70  0.210 / 0.420
G18     102.0          29.9                4.9 +/-    1.16       8.6 +/-    1.16  0.280 / 0.280
G22     301.2          12.3                5.8 +/-    2.51      15.5 +/-    2.51  0.130 / 0.090
G31     175.7          43.3                8.4 +/-    1.21      11.7 +/-    1.21  0.160 / 0.130
G32     7.6            67.1                1.3 +/-    0.63       1.4 +/-    0.63  0.050 / 0.060