PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-22:42:40
G02     201.8          30.9               14.6 +/-    1.33      25.1 +/-    1.33  0.100 / 0.100
G06     169.6          62.0               13.3 +/-    0.66      14.9 +/-    0.66  0.060 / 0.100
G17     32.7           51.7               12.5 +/-    2.27      15.5 +/-    2.27  0.040 / 0.030
G19     351.4          67.6               10.1 +/-    1.21      10.8 +/-    1.21  0.040 / 0.020
G24     301.1          36.7                9.8 +/-    2.36      15.1 +/-    2.36  0.050 / 0.090
G28     95.6           37.6               10.3 +/-    1.24      15.6 +/-    1.24  0.060 / 0.110