PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/16-16:27:40
G02     201.8          25.9               12.8 +/-    2.26      24.6 +/-    2.26  0.040 / 0.040
G06     166.1          61.2               12.5 +/-    1.35      14.1 +/-    1.35  0.030 / 0.030
G17     25.4           57.0                8.9 +/-    1.01      10.4 +/-    1.01  0.060 / 0.090
G19     347.0          68.8                9.3 +/-    0.58       9.9 +/-    0.58  0.050 / 0.080
G24     305.0          33.6                8.6 +/-    2.14      14.0 +/-    2.14  0.050 / 0.040
G28     91.2           40.8                9.6 +/-    0.97      13.8 +/-    0.97  0.040 / 0.060