PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-07:12:30
G08     297.9          22.6                2.8 +/-    1.28       5.7 +/-    1.28  0.080 / 0.110
G10     1.1            62.6                3.4 +/-    0.61       3.7 +/-    0.61  0.080 / 0.120
G14     225.9          43.2                6.4 +/-    0.73       8.8 +/-    0.73  0.030 / 0.030
G20     59.5           54.3                3.7 +/-    0.58       4.5 +/-    0.58  0.030 / 0.030
G21     144.2          43.6                6.2 +/-    1.38       8.5 +/-    1.38  0.050 / 0.080
G24     59.5           26.7                4.0 +/-    0.88       7.4 +/-    0.88  0.040 / 0.070
G27     260.6          33.9                4.4 +/-    1.61       7.1 +/-    1.61  0.060 / 0.110
G32     236.2          60.1                5.2 +/-    0.38       5.9 +/-    0.38  0.050 / 0.110