PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-08:43:10
G01     219.9          10.9                4.1 +/-    2.26      11.3 +/-    2.26  0.090 / 0.350
G03     267.0          68.8                4.2 +/-    1.40       4.5 +/-    1.40  0.090 / 0.240
G09     300.2          15.4                2.0 +/-    3.50       4.9 +/-    3.50  0.220 / 0.360
G14     95.0           17.1                4.3 +/-    1.76      10.0 +/-    1.76  0.190 / 0.330
G16     139.3          53.4                7.1 +/-    1.05       8.6 +/-    1.05  0.030 / 0.050
G22     199.1          62.4                4.8 +/-    0.85       5.4 +/-    0.85  0.040 / 0.040
G23     313.0          42.5                4.8 +/-    1.14       6.8 +/-    1.14  0.050 / 0.090
G26     83.0           54.9                6.6 +/-    0.56       7.9 +/-    0.56  0.060 / 0.080
G31     48.6           25.2                3.7 +/-    2.82       7.2 +/-    2.82  0.040 / 0.050