PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-14:43:10
G01     105.1          26.3               10.1 +/-    1.01      19.2 +/-    1.01  0.070 / 0.160
G07     110.9          53.4               10.2 +/-    0.48      12.3 +/-    0.48  0.070 / 0.160
G08     41.7           17.2                6.8 +/-    1.18      16.0 +/-    1.18  0.030 / 0.030
G09     173.5          11.0               11.4 +/-    2.16      31.1 +/-    2.16  0.030 / 0.030
G11     83.8           40.4                9.2 +/-    0.68      13.2 +/-    0.68  0.030 / 0.060
G13     309.7          28.0                7.8 +/-    1.51      14.3 +/-    1.51  0.030 / 0.040
G17     205.9          42.0               11.9 +/-    0.97      16.7 +/-    0.97  0.060 / 0.070
G19     209.2          16.1               10.5 +/-    1.45      25.5 +/-    1.45  0.030 / 0.080
G28     321.2          61.0                9.5 +/-    1.16      10.7 +/-    1.16  0.070 / 0.100
G30     18.5           77.8               10.1 +/-    0.75      10.3 +/-    0.75  0.070 / 0.120