PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-11:27:40
G01     127.9          10.9               -6.4 +/-   34.85     -17.4 +/-   34.85  0.040 / 0.050
G07     55.4           68.2                4.0 +/-    0.27       4.3 +/-    0.27  0.040 / 0.040
G08     50.6           38.8                3.3 +/-    1.16       4.9 +/-    1.16  0.040 / 0.040
G09     175.9          34.9                6.6 +/-    1.09      10.5 +/-    1.09  0.030 / 0.040
G11     117.1          33.5                4.8 +/-    1.01       7.9 +/-    1.01  0.120 / 0.340
G17     199.0          15.9                5.8 +/-    3.17      14.0 +/-    3.17  0.160 / 0.330
G23     161.2          10.4                2.7 +/-    2.46       7.5 +/-    2.46  0.210 / 0.280
G28     274.7          52.3                5.5 +/-    0.71       6.8 +/-    0.71  0.130 / 0.310
G30     329.5          57.7                3.2 +/-    0.58       3.7 +/-    0.58  0.160 / 0.170