PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-08:57:40
G08     292.2          23.3                5.4 +/-    1.62      11.0 +/-    1.62  0.050 / 0.090
G10     11.6           62.8                3.1 +/-    1.06       3.5 +/-    1.06  0.050 / 0.090
G14     230.1          47.9                7.5 +/-    2.12       9.7 +/-    2.12  0.030 / 0.030
G18     317.7          12.3                2.1 +/-    7.17       5.5 +/-    7.17  0.030 / 0.030
G20     66.7           51.6                5.8 +/-    1.07       7.2 +/-    1.07  0.070 / 0.120
G21     146.7          37.8                8.9 +/-    0.51      13.4 +/-    0.51  0.080 / 0.130
G24     54.5           24.3                4.5 +/-    2.12       9.0 +/-    2.12  0.030 / 0.030
G27     255.4          31.6                5.8 +/-    1.76       9.9 +/-    1.76  0.030 / 0.030
G32     242.7          62.5                8.2 +/-    0.64       9.1 +/-    0.64  0.150 / 0.110