PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-07:57:50
G01     225.3          16.3                5.3 +/-    2.96      12.9 +/-    2.96  0.030 / 0.030
G03     288.6          66.1                4.3 +/-    0.80       4.7 +/-    0.80  0.040 / 0.030
G14     88.5           22.0                3.3 +/-    1.01       7.0 +/-    1.01  0.390 / 0.220
G16     147.7          45.7                6.6 +/-    0.93       8.8 +/-    0.93  0.280 / 0.310
G22     211.8          70.0                5.8 +/-    0.91       6.1 +/-    0.91  0.040 / 0.100
G23     307.2          36.7                3.4 +/-    1.50       5.2 +/-    1.50  0.050 / 0.110
G26     98.5           54.9                5.6 +/-    0.98       6.7 +/-    0.98  0.110 / 0.190
G31     45.2           31.9                3.2 +/-    2.06       5.4 +/-    2.06  0.120 / 0.190