PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-01:12:40
G10     246.0          21.7               15.1 +/-    2.19      31.8 +/-    2.19  0.100 / 0.190
G13     60.2           34.0               11.6 +/-    0.58      18.8 +/-    0.58  0.110 / 0.220
G15     103.8          58.4               14.0 +/-    0.57      16.1 +/-    0.57  0.030 / 0.050
G16     302.4          14.6                7.2 +/-    1.97      18.1 +/-    1.97  0.050 / 0.050
G18     260.0          50.8               11.6 +/-    1.21      14.4 +/-    1.21  0.050 / 0.070
G20     40.0           52.0               10.8 +/-    0.36      13.3 +/-    0.36  0.060 / 0.070
G21     326.4          56.2               10.5 +/-    0.82      12.3 +/-    0.82  0.090 / 0.400
G26     274.6          17.5               10.2 +/-    1.61      24.0 +/-    1.61  0.100 / 0.360
G29     162.6          54.5               14.4 +/-    1.52      17.2 +/-    1.52  0.110 / 0.180