PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-23:42:30
G10     247.4          23.0               13.6 +/-    2.17      27.8 +/-    2.17  0.110 / 0.170
G13     58.4           33.3                7.9 +/-    0.59      13.0 +/-    0.59  0.100 / 0.200
G15     97.6           58.3                9.2 +/-    0.69      10.7 +/-    0.69  0.130 / 0.250
G16     301.4          14.4                7.4 +/-    2.25      18.7 +/-    2.25  0.110 / 0.290
G18     262.9          52.7               11.7 +/-    1.11      14.3 +/-    1.11  0.030 / 0.060
G20     40.9           50.7                7.7 +/-    0.36       9.7 +/-    0.36  0.030 / 0.060
G26     273.6          16.8               11.1 +/-    1.51      26.5 +/-    1.51  0.040 / 0.050
G29     162.7          51.5               11.0 +/-    0.51      13.6 +/-    0.51  0.040 / 0.060