PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-14:57:40
G02     18.9           66.7                7.6 +/-    0.56       8.2 +/-    0.56  0.030 / 0.050
G05     159.2          47.2               12.4 +/-    1.04      16.2 +/-    1.04  0.040 / 0.050
G06     46.5           29.0                6.1 +/-    0.59      11.0 +/-    0.59  0.030 / 0.030
G12     250.3          79.1                8.4 +/-    0.96       8.6 +/-    0.96  0.030 / 0.030
G19     89.6           16.7               10.9 +/-    2.15      26.0 +/-    2.15  0.090 / 0.350
G20     197.9          12.6               10.2 +/-    2.52      26.9 +/-    2.52  0.110 / 0.470
G24     218.8          12.7                9.7 +/-    1.86      25.4 +/-    1.86  0.080 / 0.480
G25     310.6          44.6                9.3 +/-    2.82      12.6 +/-    2.82  0.090 / 0.400
G29     299.9          22.9                7.5 +/-    1.07      15.4 +/-    1.07  0.050 / 0.080