PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-08:27:50
G01     319.3          18.1                2.5 +/-    1.99       5.7 +/-    1.99  0.330 / 0.270
G08     258.5          13.8                5.3 +/-    2.89      13.5 +/-    2.89  0.110 / 0.250
G10     79.3           52.4                3.0 +/-    0.94       3.6 +/-    0.94  0.110 / 0.190
G11     303.3          23.0                1.7 +/-    1.30       3.5 +/-    1.30  0.130 / 0.140
G14     295.3          71.0                1.6 +/-    0.75       1.7 +/-    0.75  0.030 / 0.040
G18     304.5          41.4                3.8 +/-    1.91       5.4 +/-    1.91  0.030 / 0.030
G20     104.9          29.5                4.4 +/-    0.72       7.7 +/-    0.72  0.030 / 0.020
G22     301.4          12.7                0.6 +/-    3.05       1.5 +/-    3.05  0.030 / 0.020
G31     176.1          41.0                5.3 +/-    1.26       7.6 +/-    1.26  0.050 / 0.040
G32     355.2          70.1                2.3 +/-    1.22       2.5 +/-    1.22  0.040 / 0.040