PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/20-01:42:50
G01     255.5          37.2                5.6 +/-    1.32       8.5 +/-    1.32  0.030 / 0.040
G03     316.3          38.4                6.3 +/-    1.46       9.4 +/-    1.46  0.030 / 0.040
G11     239.3          14.9                8.0 +/-    1.28      20.0 +/-    1.28  0.120 / 0.460
G14     57.3           42.1                5.8 +/-    1.19       8.1 +/-    1.19  0.210 / 0.390
G22     309.2          61.6                6.9 +/-    0.65       7.7 +/-    0.65  0.020 / 0.040
G23     283.1          15.7                6.6 +/-    9.80      16.0 +/-    9.80  0.020 / 0.040
G25     41.3           11.1                4.8 +/-    1.43      13.0 +/-    1.43  0.130 / 0.280
G26     145.0          32.7               10.3 +/-    1.20      17.1 +/-    1.20  0.150 / 0.370
G31     41.4           67.1                4.0 +/-    1.44       4.3 +/-    1.44  0.060 / 0.110
G32     72.7           27.7                4.2 +/-    1.52       7.7 +/-    1.52  0.050 / 0.120