PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-11:12:50
G01     123.5          14.5                5.4 +/-    2.06      13.7 +/-    2.06  0.030 / 0.030
G07     66.6           68.5                5.4 +/-    1.00       5.8 +/-    1.00  0.030 / 0.030
G08     46.7           33.9                3.4 +/-    0.58       5.6 +/-    0.58  0.030 / 0.040
G09     175.7          29.0                6.9 +/-    1.45      12.4 +/-    1.45  0.030 / 0.040
G11     111.6          37.7                5.2 +/-    0.67       7.8 +/-    0.67  0.160 / 0.190
G13     319.7          15.5                1.9 +/-    2.61       4.5 +/-    2.61  0.130 / 0.160
G17     200.0          20.7                5.6 +/-    1.66      12.1 +/-    1.66  0.120 / 0.440
G18     98.8           18.6                4.4 +/-    1.26      10.1 +/-    1.26  0.110 / 0.430
G28     283.0          54.9                5.3 +/-    0.63       6.3 +/-    0.63  0.110 / 0.270
G30     335.8          62.9                4.0 +/-    0.52       4.5 +/-    0.52  0.110 / 0.230