PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-16:27:50
G02     203.7          33.2               10.0 +/-    1.35      16.4 +/-    1.35  0.070 / 0.280
G06     157.9          69.2               13.6 +/-    0.55      14.4 +/-    0.55  0.130 / 0.260
G12     306.6          14.2                7.3 +/-    2.67      18.6 +/-    2.67  0.050 / 0.040
G17     32.9           51.6                8.3 +/-    1.51      10.3 +/-    1.51  0.050 / 0.050
G19     4.4            64.6                8.6 +/-    0.68       9.4 +/-    0.68  0.050 / 0.100
G24     297.9          37.6                8.5 +/-    3.14      12.8 +/-    3.14  0.070 / 0.070
G28     99.3           36.3                9.0 +/-    0.81      14.0 +/-    0.81  0.040 / 0.040