PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-08:12:30
G08     296.3          22.9                5.4 +/-    1.54      11.1 +/-    1.54  0.100 / 0.110
G10     3.6            62.7                4.8 +/-    0.52       5.3 +/-    0.52  0.090 / 0.110
G14     226.9          44.5                9.8 +/-    0.92      13.3 +/-    0.92  0.050 / 0.080
G20     61.4           53.6                5.8 +/-    0.66       7.0 +/-    0.66  0.040 / 0.070
G21     144.8          41.8                7.3 +/-    1.00      10.4 +/-    1.00  0.030 / 0.030
G24     58.0           26.1                5.1 +/-    0.36       9.7 +/-    0.36  0.030 / 0.030
G27     259.4          33.3                8.1 +/-    1.16      13.2 +/-    1.16  0.060 / 0.090
G32     237.6          60.5                8.2 +/-    0.58       9.3 +/-    0.58  0.060 / 0.120