PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-02:58:10
G01     223.1          13.9                6.1 +/-    1.73      15.5 +/-    1.73  0.040 / 0.040
G03     278.3          68.2                3.5 +/-    1.32       3.8 +/-    1.32  0.040 / 0.040
G09     297.1          11.3               -3.6 +/-   28.00      -9.8 +/-   28.00  0.190 / 0.450
G14     91.2           20.3                4.2 +/-    1.65       9.1 +/-    1.65  0.190 / 0.500
G16     149.4          47.3                7.5 +/-    0.80       9.8 +/-    0.80  0.130 / 0.400
G22     209.7          67.5                6.8 +/-    0.61       7.3 +/-    0.61  0.230 / 0.450
G23     309.7          39.1                4.3 +/-    1.13       6.4 +/-    1.13  0.040 / 0.080
G26     97.9           56.6                3.8 +/-    0.60       4.5 +/-    0.60  0.050 / 0.090
G31     45.5           32.5                2.4 +/-    1.16       4.1 +/-    1.16  0.030 / 0.070