PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-14:27:50
G01     112.2          22.3                8.1 +/-    1.03      16.8 +/-    1.03  0.160 / 0.190
G07     99.9           58.8               10.6 +/-    0.68      12.1 +/-    0.68  0.230 / 0.200
G08     42.5           23.4                6.4 +/-    2.22      13.1 +/-    2.22  0.110 / 0.160
G09     174.7          17.6                8.9 +/-    2.86      20.7 +/-    2.86  0.130 / 0.140
G11     93.7           40.1               10.0 +/-    0.85      14.5 +/-    0.85  0.030 / 0.030
G13     314.8          23.2                7.5 +/-    1.51      15.3 +/-    1.51  0.030 / 0.030
G17     203.1          34.5               12.0 +/-    1.17      19.2 +/-    1.17  0.030 / 0.030
G28     306.8          59.5                9.2 +/-    0.84      10.5 +/-    0.84  0.030 / 0.030
G30     355.7          72.6                9.0 +/-    0.67       9.4 +/-    0.67  0.110 / 0.120