PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-20:27:30
G02     13.3           68.6               10.7 +/-    0.86      11.4 +/-    0.86  0.100 / 0.370
G05     159.3          47.9               14.4 +/-    1.60      18.7 +/-    1.60  0.120 / 0.360
G06     47.9           25.5                9.5 +/-    0.62      18.3 +/-    0.62  0.030 / 0.030
G12     230.1          78.8                9.0 +/-    1.20       9.1 +/-    1.20  0.030 / 0.030
G19     90.9           15.6                9.7 +/-    1.94      23.7 +/-    1.94  0.040 / 0.080
G20     197.0          15.3               16.8 +/-    4.60      41.5 +/-    4.60  0.060 / 0.070
G24     218.0          11.9               16.0 +/-    1.88      42.7 +/-    1.88  0.110 / 0.240
G25     308.0          48.8               12.2 +/-    1.22      15.7 +/-    1.22  0.110 / 0.250
G29     299.1          20.5               12.0 +/-    2.16      26.0 +/-    2.16  0.050 / 0.060