PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-21:57:50
G02     213.5          57.6               12.8 +/-    0.72      14.8 +/-    0.72  0.100 / 0.210
G06     73.6           78.7               12.0 +/-    0.40      12.2 +/-    0.40  0.100 / 0.150
G12     316.4          30.7               10.7 +/-    1.02      18.5 +/-    1.02  0.030 / 0.030
G17     54.5           34.2               10.8 +/-    1.05      17.4 +/-    1.05  0.030 / 0.030
G19     35.9           50.8               10.9 +/-    0.32      13.6 +/-    0.32  0.040 / 0.060
G24     268.5          42.2               10.9 +/-    1.32      15.3 +/-    1.32  0.040 / 0.050
G28     118.9          20.2               14.8 +/-    0.50      32.4 +/-    0.50  0.080 / 0.120