PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-09:42:50
G02     199.9          21.9                7.0 +/-    1.75      14.8 +/-    1.75  0.070 / 0.080
G06     175.2          51.2               10.5 +/-    0.86      13.1 +/-    0.86  0.070 / 0.110
G13     228.4          13.0                2.8 +/-    6.21       7.2 +/-    6.21  0.070 / 0.090
G17     24.5           58.3                6.6 +/-    0.83       7.6 +/-    0.83  0.080 / 0.110
G19     329.6          71.1                5.7 +/-    0.38       6.0 +/-    0.38  0.020 / 0.030
G24     310.9          28.6                2.9 +/-    1.20       5.3 +/-    1.20  0.070 / 0.040
G28     89.0           39.0                7.7 +/-    0.99      11.3 +/-    0.99  0.040 / 0.040
G30     157.0          13.9                5.8 +/-    1.94      14.8 +/-    1.94  0.040 / 0.040