PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-22:43:20
G02     203.5          37.0               15.5 +/-    1.67      23.7 +/-    1.67  0.070 / 0.130
G06     163.9          68.8               14.4 +/-    1.02      15.3 +/-    1.02  0.070 / 0.120
G12     307.2          14.2                9.1 +/-    3.17      23.1 +/-    3.17  0.080 / 0.080
G17     38.0           47.3               11.9 +/-    0.37      15.5 +/-    0.37  0.070 / 0.100
G19     5.0            64.2               11.5 +/-    0.52      12.7 +/-    0.52  0.080 / 0.230
G24     294.7          39.6               11.9 +/-    0.88      17.4 +/-    0.88  0.090 / 0.230
G28     101.8          33.8               14.0 +/-    0.58      22.7 +/-    0.58  0.030 / 0.030