PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/29-12:27:40
G07     40.1           69.7                5.2 +/-    0.91       5.5 +/-    0.91  0.040 / 0.060
G08     53.2           41.7                4.6 +/-    1.16       6.5 +/-    1.16  0.040 / 0.060
G09     177.0          38.6                6.8 +/-    0.60      10.2 +/-    0.60  0.180 / 0.420
G11     121.6          33.0                5.6 +/-    0.67       9.3 +/-    0.67  0.270 / 0.380
G17     199.3          11.4               -2.6 +/-   18.17      -7.0 +/-   18.17  0.070 / 0.130
G18     107.1          14.6                5.8 +/-    1.83      14.5 +/-    1.83  0.080 / 0.130
G23     160.5          11.0                3.0 +/-    2.64       8.1 +/-    2.64  0.050 / 0.080
G27     37.9           10.6                4.9 +/-    1.55      13.4 +/-    1.55  0.050 / 0.080
G28     269.9          50.5                5.7 +/-    1.06       7.2 +/-    1.06  0.030 / 0.040
G30     327.1          56.2                3.6 +/-    1.23       4.3 +/-    1.23  0.030 / 0.040