PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-07:27:50
G03     247.8          68.0                6.0 +/-    0.59       6.4 +/-    0.59  0.100 / 0.190
G09     304.3          20.9                5.6 +/-    2.01      12.0 +/-    2.01  0.120 / 0.180
G14     100.0          13.2                3.4 +/-    1.69       8.7 +/-    1.69  0.040 / 0.040
G16     131.7          58.5                8.2 +/-    0.38       9.4 +/-    0.38  0.050 / 0.050
G22     195.0          56.4                5.6 +/-    0.95       6.6 +/-    0.95  0.030 / 0.040
G23     317.6          47.1                6.3 +/-    1.02       8.2 +/-    1.02  0.030 / 0.040
G26     73.0           53.6                7.5 +/-    0.38       9.1 +/-    0.38  0.210 / 0.310
G31     51.4           21.1                2.8 +/-    2.60       5.9 +/-    2.60  0.140 / 0.350