PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-12:57:40
G01     106.9          25.4                6.1 +/-    1.52      11.9 +/-    1.52  0.200 / 0.330
G07     108.1          55.4                6.1 +/-    0.54       7.3 +/-    0.54  0.210 / 0.360
G08     41.8           18.6                5.4 +/-    1.29      12.4 +/-    1.29  0.020 / 0.020
G09     173.1          11.6                6.1 +/-    1.70      16.4 +/-    1.70  0.020 / 0.020
G11     86.7           40.8                5.5 +/-    1.54       7.9 +/-    1.54  0.030 / 0.040
G13     311.2          26.8                4.0 +/-    1.03       7.5 +/-    1.03  0.040 / 0.040
G17     205.1          40.2                7.4 +/-    0.82      10.7 +/-    0.82  0.100 / 0.150
G19     208.8          14.4                4.6 +/-    3.07      11.5 +/-    3.07  0.090 / 0.180
G28     318.1          60.8                2.5 +/-    0.77       2.8 +/-    0.77  0.080 / 0.110
G30     13.4           76.9                4.4 +/-    0.51       4.5 +/-    0.51  0.080 / 0.140