PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-16:27:30
G02     19.9           65.8               18.0 +/-    0.60      19.6 +/-    0.60  0.060 / 0.050
G05     159.3          48.4               22.7 +/-    0.68      29.2 +/-    0.68  0.060 / 0.050
G06     47.6           26.6               14.3 +/-    2.00      26.9 +/-    2.00  0.220 / 0.250
G12     237.2          78.5               17.5 +/-    0.42      17.8 +/-    0.42  0.290 / 0.400
G19     91.2           15.5               14.1 +/-    1.35      34.7 +/-    1.35  0.030 / 0.020
G20     197.6          14.8               29.5 +/-    1.88      73.7 +/-    1.88  0.030 / 0.020
G24     217.6          11.5               25.8 +/-    3.85      69.9 +/-    3.85  0.030 / 0.040
G25     308.8          46.9               18.7 +/-    1.06      24.6 +/-    1.06  0.040 / 0.040
G29     300.7          23.2               18.7 +/-    1.52      38.2 +/-    1.52  0.260 / 0.400