PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-14:42:40
G01     316.1          23.6                5.4 +/-    1.33      10.9 +/-    1.33  0.220 / 0.170
G10     90.0           49.4                5.4 +/-    1.20       6.8 +/-    1.20  0.120 / 0.150
G11     299.2          24.0                5.6 +/-    1.27      11.2 +/-    1.27  0.050 / 0.050
G14     314.3          70.5                5.9 +/-    0.40       6.2 +/-    0.40  0.060 / 0.030
G22     304.6          17.5                6.6 +/-    2.18      15.4 +/-    2.18  0.030 / 0.050
G25     95.6           11.7                9.4 +/-    1.50      25.3 +/-    1.50  0.040 / 0.050
G31     173.0          50.9                9.1 +/-    0.58      11.4 +/-    0.58  0.140 / 0.180
G32     21.2           61.5                6.5 +/-    0.66       7.3 +/-    0.66  0.140 / 0.210