PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-13:58:10
G01     225.5          16.1                7.7 +/-    4.71      18.5 +/-    4.71  0.090 / 0.200
G03     278.0          70.1                8.6 +/-    0.82       9.1 +/-    0.82  0.120 / 0.180
G14     86.2           26.7                7.4 +/-    1.42      13.8 +/-    1.42  0.050 / 0.080
G16     143.6          47.2               12.6 +/-    1.22      16.5 +/-    1.22  0.050 / 0.080
G22     198.8          66.6                9.8 +/-    1.26      10.6 +/-    1.26  0.030 / 0.060
G23     311.5          42.6                7.5 +/-    1.06      10.5 +/-    1.06  0.030 / 0.050
G26     91.5           53.8                9.0 +/-    0.39      10.9 +/-    0.39  0.050 / 0.100
G31     46.4           29.1                5.5 +/-    0.74       9.9 +/-    0.74  0.060 / 0.100