PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-06:57:30
G03     239.2          66.7                4.8 +/-    0.78       5.2 +/-    0.78  0.070 / 0.120
G09     306.0          23.0                3.9 +/-    1.22       7.9 +/-    1.22  0.070 / 0.130
G14     102.4          11.3                4.0 +/-    2.02      10.8 +/-    2.02  0.050 / 0.050
G16     127.0          60.7                7.7 +/-    0.43       8.7 +/-    0.43  0.060 / 0.030
G22     193.3          53.4                6.0 +/-    0.50       7.3 +/-    0.50  0.190 / 0.350
G23     319.8          49.5                3.5 +/-    0.89       4.5 +/-    0.89  0.170 / 0.360
G26     68.5           52.6                6.1 +/-    0.53       7.4 +/-    0.53  0.030 / 0.030
G31     52.9           19.2                2.3 +/-    2.57       5.1 +/-    2.57  0.030 / 0.030