PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-16:57:30
G02     209.7          47.1               16.6 +/-    0.44      21.7 +/-    0.44  0.060 / 0.080
G06     105.0          79.6               15.1 +/-    0.54      15.3 +/-    0.54  0.060 / 0.090
G12     315.3          27.8               12.5 +/-    1.75      23.0 +/-    1.75  0.060 / 0.110
G17     51.2           36.5               11.9 +/-    0.65      18.3 +/-    0.65  0.050 / 0.120
G19     30.1           54.2               13.9 +/-    1.42      16.7 +/-    1.42  0.050 / 0.080
G24     281.7          41.8               11.9 +/-    1.08      16.8 +/-    1.08  0.040 / 0.100
G28     115.9          20.6               13.4 +/-    1.11      29.0 +/-    1.11  0.040 / 0.030