PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-09:42:50
G01     127.5          11.2                4.2 +/-    4.63      11.4 +/-    4.63  0.030 / 0.030
G07     55.5           68.5                6.4 +/-    0.58       6.9 +/-    0.58  0.030 / 0.030
G08     50.3           38.5                5.0 +/-    0.70       7.5 +/-    0.70  0.030 / 0.030
G09     176.8          35.4                6.1 +/-    0.91       9.7 +/-    0.91  0.030 / 0.020
G11     117.2          33.9                7.5 +/-    1.36      12.2 +/-    1.36  0.100 / 0.160
G17     199.1          16.3                5.1 +/-    2.64      12.3 +/-    2.64  0.080 / 0.170
G28     275.8          52.8                6.9 +/-    3.40       8.4 +/-    3.40  0.250 / 0.330
G30     330.8          58.7                4.6 +/-    0.59       5.2 +/-    0.59  0.370 / 0.320