PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-05:58:10
G01     305.4          34.3                4.1 +/-    2.12       6.7 +/-    2.12  0.050 / 0.050
G10     107.2          40.0                4.6 +/-    0.61       6.6 +/-    0.61  0.040 / 0.040
G11     277.4          29.8                5.2 +/-    1.73       9.2 +/-    1.73  0.040 / 0.010
G14     4.4            65.4                3.9 +/-    0.75       4.2 +/-    0.75  0.050 / 0.020
G18     117.7          14.9                4.7 +/-    2.27      11.7 +/-    2.27  0.110 / 0.100
G22     310.3          28.0                2.4 +/-    1.82       4.3 +/-    1.82  0.080 / 0.110
G25     75.9           16.1                3.9 +/-    1.76       9.5 +/-    1.76  0.070 / 0.030
G31     165.2          66.7                6.1 +/-    0.32       6.6 +/-    0.32  0.060 / 0.030
G32     36.8           52.0                5.2 +/-    1.63       6.4 +/-    1.63  0.040 / 0.040