PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-09:12:30
G03     254.9          68.7                3.7 +/-    0.52       4.0 +/-    0.52  0.040 / 0.080
G09     302.4          17.9                3.1 +/-    2.14       7.1 +/-    2.14  0.070 / 0.080
G14     98.1           14.7                1.5 +/-    1.93       3.8 +/-    1.93  0.040 / 0.040
G16     133.7          56.8                6.1 +/-    1.46       7.1 +/-    1.46  0.040 / 0.040
G22     195.2          58.3                4.9 +/-    0.66       5.7 +/-    0.66  0.040 / 0.050
G23     315.9          45.5                3.3 +/-    0.95       4.4 +/-    0.95  0.030 / 0.050
G26     75.8           53.8                4.0 +/-    0.57       4.8 +/-    0.57  0.090 / 0.280
G31     50.5           22.0                0.8 +/-    1.57       1.7 +/-    1.57  0.100 / 0.300