PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-14:27:20
G01     106.8          25.4                9.5 +/-    2.04      18.4 +/-    2.04  0.220 / 0.260
G07     108.5          54.8                9.0 +/-    0.53      10.7 +/-    0.53  0.220 / 0.290
G08     41.8           18.6                6.6 +/-    1.60      15.0 +/-    1.60  0.060 / 0.150
G09     173.7          12.4               11.2 +/-    3.10      29.7 +/-    3.10  0.120 / 0.200
G11     86.2           40.5                7.7 +/-    1.60      11.1 +/-    1.60  0.040 / 0.020
G13     311.1          26.9                8.1 +/-    1.27      15.2 +/-    1.27  0.040 / 0.030
G17     205.1          40.2               11.7 +/-    0.66      16.9 +/-    0.66  0.030 / 0.040
G19     208.8          14.5                8.7 +/-    2.98      21.8 +/-    2.98  0.030 / 0.040
G28     317.8          60.8                6.7 +/-    0.69       7.5 +/-    0.69  0.080 / 0.110
G30     12.0           76.8                8.5 +/-    1.28       8.7 +/-    1.28  0.070 / 0.120