PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-23:28:10
G02     218.8          64.0               18.6 +/-    0.55      20.4 +/-    0.55  0.050 / 0.090
G06     54.3           74.9               14.0 +/-    0.75      14.4 +/-    0.75  0.040 / 0.100
G12     318.3          36.0               12.2 +/-    1.06      19.0 +/-    1.06  0.070 / 0.080
G17     59.8           29.8               13.0 +/-    0.78      22.8 +/-    0.78  0.080 / 0.080
G19     42.6           47.0               13.7 +/-    0.28      18.0 +/-    0.28  0.080 / 0.260
G24     259.9          40.8               17.0 +/-    1.28      24.4 +/-    1.28  0.070 / 0.220
G28     123.3          15.4               16.4 +/-    2.30      40.4 +/-    2.30  0.030 / 0.030