PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-19:12:00
G02     43.0           47.3                8.7 +/-    1.01      11.3 +/-    1.01  0.030 / 0.030
G05     105.3          69.6               10.1 +/-    0.58      10.7 +/-    0.58  0.040 / 0.020
G12     184.3          48.7               10.9 +/-    0.60      14.0 +/-    0.60  0.040 / 0.050
G25     269.6          58.9                8.2 +/-    3.61       9.5 +/-    3.61  0.040 / 0.050
G29     315.8          37.3                8.1 +/-    1.03      12.4 +/-    1.03  0.040 / 0.060