PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-18:42:50
G10     245.6          21.5               13.2 +/-    2.21      28.0 +/-    2.21  0.050 / 0.060
G13     60.9           34.2               13.1 +/-    0.50      21.0 +/-    0.50  0.030 / 0.050
G15     98.1           57.3               14.0 +/-    0.51      16.4 +/-    0.51  0.150 / 0.330
G16     306.7          12.9               10.3 +/-    2.89      27.0 +/-    2.89  0.160 / 0.370
G18     261.1          52.8               13.2 +/-    0.71      16.1 +/-    0.71  0.050 / 0.120
G20     37.6           54.7               10.7 +/-    0.71      12.8 +/-    0.71  0.040 / 0.130
G26     278.9          16.9               11.0 +/-    1.30      26.1 +/-    1.30  0.100 / 0.370
G29     159.8          50.8               13.9 +/-    1.08      17.3 +/-    1.08  0.120 / 0.380