PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/28-02:27:50
G01     223.8          14.6                6.9 +/-    1.26      17.2 +/-    1.26  0.030 / 0.040
G03     281.0          67.9                4.5 +/-    0.95       4.8 +/-    0.95  0.040 / 0.040
G09     296.3          10.4              -12.3 +/-   22.09     -34.0 +/-   22.09  0.270 / 0.310
G14     90.2           21.1                4.9 +/-    1.30      10.6 +/-    1.30  0.220 / 0.410
G16     150.8          46.0               10.5 +/-    1.04      13.9 +/-    1.04  0.040 / 0.080
G22     211.7          68.4                7.8 +/-    0.59       8.4 +/-    0.59  0.050 / 0.070
G23     309.0          38.4                5.1 +/-    1.31       7.6 +/-    1.31  0.130 / 0.490
G26     98.9           56.2                7.3 +/-    0.23       8.6 +/-    0.23  0.140 / 0.390
G31     44.9           33.9               -0.5 +/-    0.58      -0.8 +/-    0.58  0.080 / 0.280