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                4.6 +/-    0.76       4.9 +/-    0.76  0.030 / 0.030
G08     52.2           40.4                2.8 +/-    0.71       4.0 +/-    0.71  0.030 / 0.030
G09     176.4          37.5                6.2 +/-    0.92       9.3 +/-    0.92  0.020 / 0.030
G11     120.5          33.4                4.4 +/-    1.28       7.2 +/-    1.28  0.030 / 0.030
G17     199.0          12.7               -0.7 +/-   12.80      -1.8 +/-   12.80  0.310 / 0.330
G18     106.4          14.8                3.3 +/-    2.72       8.1 +/-    2.72  0.210 / 0.330
G23     160.9          11.6                3.8 +/-    2.28      10.3 +/-    2.28  0.220 / 0.240
G27     37.8           10.4                2.7 +/-    3.46       7.4 +/-    3.46  0.150 / 0.260
G28     270.4          50.7                3.8 +/-    2.57       4.7 +/-    2.57  0.160 / 0.320
G30     326.9          56.1                3.7 +/-    0.65       4.4 +/-    0.65  0.140 / 0.330