PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-08:58:10
G03     257.4          68.8                4.2 +/-    1.04       4.5 +/-    1.04  0.230 / 0.190
G09     302.0          17.5                4.1 +/-    1.69       9.7 +/-    1.69  0.120 / 0.180
G14     97.5           15.2                2.8 +/-    1.58       6.9 +/-    1.58  0.040 / 0.060
G16     135.1          56.1                6.5 +/-    0.65       7.7 +/-    0.65  0.030 / 0.070
G22     196.1          59.2                5.9 +/-    0.75       6.7 +/-    0.75  0.040 / 0.050
G23     315.3          44.8                4.6 +/-    0.89       6.3 +/-    0.89  0.030 / 0.040
G26     77.3           54.1                6.7 +/-    0.80       8.0 +/-    0.80  0.030 / 0.030
G31     50.1           22.7                2.2 +/-    2.04       4.6 +/-    2.04  0.030 / 0.030