PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/01-19:42:50
G02     217.9          61.0               10.9 +/-    1.31      12.3 +/-    1.31  0.040 / 0.070
G06     52.4           71.2               10.1 +/-    0.52      10.6 +/-    0.52  0.040 / 0.070
G12     319.9          40.3                9.1 +/-    1.56      13.2 +/-    1.56  0.070 / 0.080
G17     58.5           31.9                7.8 +/-    1.35      13.1 +/-    1.35  0.070 / 0.060
G19     38.7           49.9                9.3 +/-    1.82      11.7 +/-    1.82  0.050 / 0.080
G24     261.6          41.3               10.9 +/-    3.66      15.6 +/-    3.66  0.060 / 0.080
G28     123.9          12.3               10.0 +/-    2.02      26.6 +/-    2.02  0.050 / 0.060