PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-11:43:00
G01     91.8           31.4                4.2 +/-    0.99       7.2 +/-    0.99  0.020 / 0.030
G07     124.2          46.5                5.6 +/-    0.91       7.4 +/-    0.91  0.030 / 0.030
G11     68.6           39.3                4.5 +/-    1.26       6.6 +/-    1.26  0.030 / 0.040
G13     295.8          35.9                5.2 +/-    3.12       8.2 +/-    3.12  0.050 / 0.040
G17     212.8          54.4                7.8 +/-    0.75       9.4 +/-    0.75  0.080 / 0.110
G18     64.5           23.7                3.9 +/-    0.96       7.8 +/-    0.96  0.090 / 0.110
G19     214.3          22.1                5.0 +/-    1.45      10.3 +/-    1.45  0.080 / 0.090
G28     345.6          61.8                4.7 +/-    0.65       5.3 +/-    0.65  0.080 / 0.080
G30     92.8           78.9                5.9 +/-    0.38       6.0 +/-    0.38  0.070 / 0.140