PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-10:58:10
G07     41.9           69.7                3.6 +/-    0.64       3.8 +/-    0.64  0.030 / 0.050
G08     52.2           40.4                2.5 +/-    0.62       3.5 +/-    0.62  0.030 / 0.040
G09     176.4          37.5                5.7 +/-    1.40       8.7 +/-    1.40  0.030 / 0.040
G11     120.5          33.4                4.3 +/-    0.93       7.1 +/-    0.93  0.030 / 0.040
G17     199.0          12.7                3.4 +/-    3.00       8.9 +/-    3.00  0.190 / 0.330
G18     106.4          14.8                4.0 +/-    0.94      10.0 +/-    0.94  0.170 / 0.390
G23     160.9          11.6                2.5 +/-    6.35       6.8 +/-    6.35  0.190 / 0.230
G27     37.8           10.4                2.4 +/-    2.08       6.5 +/-    2.08  0.130 / 0.240
G28     270.4          50.7                3.6 +/-    0.65       4.4 +/-    0.65  0.150 / 0.240
G30     326.9          56.1                1.9 +/-    1.41       2.3 +/-    1.41  0.200 / 0.270