PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-22:58:10
G05     50.7           15.3                8.9 +/-    0.84      22.1 +/-    0.84  0.080 / 0.200
G10     240.9          16.7               22.0 +/-    3.72      52.5 +/-    3.72  0.100 / 0.230
G13     68.5           36.5               12.7 +/-    0.78      19.6 +/-    0.78  0.030 / 0.060
G15     114.8          55.9               16.2 +/-    0.47      19.1 +/-    0.47  0.040 / 0.080
G16     309.8          13.1                9.8 +/-    2.42      25.6 +/-    2.42  0.160 / 0.230
G18     252.4          46.8               15.0 +/-    1.16      19.7 +/-    1.16  0.120 / 0.230
G20     34.7           58.7               11.3 +/-    0.30      13.0 +/-    0.30  0.100 / 0.240
G21     319.9          52.0               13.5 +/-    1.77      16.7 +/-    1.77  0.110 / 0.310
G26     282.6          18.9               11.3 +/-    1.22      25.5 +/-    1.22  0.030 / 0.040
G29     159.0          61.2               17.7 +/-    1.00      19.9 +/-    1.00  0.020 / 0.040