PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-07:57:30
G03     257.0          68.7                3.5 +/-    0.86       3.7 +/-    0.86  0.110 / 0.160
G09     302.3          18.2                4.7 +/-    2.64      10.7 +/-    2.64  0.100 / 0.180
G14     97.6           15.1                3.6 +/-    1.02       8.9 +/-    1.02  0.040 / 0.040
G16     135.8          56.1                6.5 +/-    0.54       7.6 +/-    0.54  0.030 / 0.030
G22     196.9          59.4                5.6 +/-    0.64       6.4 +/-    0.64  0.030 / 0.060
G23     315.3          44.8                3.8 +/-    1.16       5.2 +/-    1.16  0.060 / 0.060
G26     77.8           54.4                5.8 +/-    0.54       7.0 +/-    0.54  0.150 / 0.310
G31     50.0           23.1                1.8 +/-    2.04       3.7 +/-    2.04  0.120 / 0.330