PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-16:43:00
G02     66.7           26.6                8.2 +/-    0.56      15.5 +/-    0.56  0.040 / 0.050
G05     50.7           56.3                8.1 +/-    0.73       9.5 +/-    0.73  0.030 / 0.050
G12     184.2          24.7               11.0 +/-    1.77      21.6 +/-    1.77  0.050 / 0.150
G13     123.0          20.7               12.8 +/-    1.20      27.5 +/-    1.20  0.110 / 0.180
G15     158.6          18.9               14.1 +/-    1.68      31.8 +/-    1.68  0.030 / 0.040
G20     214.2          68.6               13.2 +/-    0.63      14.1 +/-    0.63  0.030 / 0.040
G25     223.9          44.7               10.8 +/-    0.94      14.6 +/-    0.94  0.060 / 0.220
G29     341.6          68.3                8.5 +/-    0.67       9.1 +/-    0.67  0.060 / 0.200