PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-22:58:00
G02     201.2          28.4               14.6 +/-    2.11      26.5 +/-    2.11  0.070 / 0.100
G06     171.4          59.1               13.1 +/-    0.50      15.0 +/-    0.50  0.070 / 0.080
G17     30.5           53.5               10.2 +/-    0.66      12.3 +/-    0.66  0.040 / 0.040
G19     344.7          68.9                9.3 +/-    0.44       9.9 +/-    0.44  0.030 / 0.030
G24     303.4          35.3                9.5 +/-    1.47      15.0 +/-    1.47  0.040 / 0.030
G28     92.9           39.0               12.0 +/-    1.86      17.7 +/-    1.86  0.040 / 0.030