PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-15:57:50
G07     305.8          48.2                9.3 +/-    1.60      12.1 +/-    1.60  0.060 / 0.080
G08     133.0          36.0               13.5 +/-    1.28      21.0 +/-    1.28  0.040 / 0.060
G09     315.6          71.4                9.1 +/-    0.64       9.6 +/-    0.64  0.110 / 0.280
G16     42.0           32.9                6.8 +/-    0.69      11.2 +/-    0.69  0.090 / 0.240
G23     137.3          70.0                9.9 +/-    0.64      10.5 +/-    0.64  0.040 / 0.080
G27     89.6           36.9                9.8 +/-    0.72      15.1 +/-    0.72  0.050 / 0.080
G30     281.8          19.9                8.6 +/-    1.25      19.0 +/-    1.25  0.080 / 0.110