PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-23:57:40
G10     258.1          31.6               11.7 +/-    2.25      19.8 +/-    2.25  0.100 / 0.100
G13     47.7           26.1                9.4 +/-    1.55      18.0 +/-    1.55  0.060 / 0.120
G15     73.0           55.6               10.2 +/-    0.52      12.1 +/-    0.52  0.040 / 0.040
G16     289.5          13.6               10.0 +/-    2.20      25.8 +/-    2.20  0.040 / 0.050
G18     282.0          60.0               10.7 +/-    0.86      12.1 +/-    0.86  0.180 / 0.400
G20     49.2           40.5                9.1 +/-    0.65      13.1 +/-    0.65  0.180 / 0.440
G21     345.8          66.4                8.8 +/-    0.82       9.5 +/-    0.82  0.030 / 0.090
G26     262.3          11.9               11.3 +/-    1.59      30.2 +/-    1.59  0.040 / 0.070
G27     321.0          13.4                7.3 +/-    2.28      18.9 +/-    2.28  0.100 / 0.230
G29     165.8          37.9               11.8 +/-    1.55      17.8 +/-    1.55  0.110 / 0.220