PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-13:28:00
G01     71.5           32.8                6.4 +/-    1.58      10.5 +/-    1.58  0.030 / 0.040
G07     136.8          29.0                8.1 +/-    0.69      14.5 +/-    0.69  0.030 / 0.030
G11     53.4           28.9                4.8 +/-    1.07       8.6 +/-    1.07  0.050 / 0.120
G13     278.0          36.8                6.8 +/-    0.78      10.5 +/-    0.78  0.050 / 0.130
G15     305.2          14.3                3.3 +/-    3.04       8.4 +/-    3.04  0.070 / 0.120
G17     233.5          71.2                6.9 +/-    0.68       7.3 +/-    0.68  0.080 / 0.110
G19     223.7          43.3                9.5 +/-    2.22      13.1 +/-    2.22  0.060 / 0.090
G28     18.7           59.3                6.2 +/-    0.48       7.1 +/-    0.48  0.060 / 0.070
G30     133.5          64.5                7.4 +/-    0.64       8.1 +/-    0.64  0.040 / 0.040