PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/24-19:27:40
G02     35.3           54.0               14.8 +/-    0.61      17.8 +/-    0.61  0.030 / 0.040
G05     143.2          63.9               16.6 +/-    0.74      18.2 +/-    0.74  0.030 / 0.040
G06     56.4           12.9                9.8 +/-    1.70      25.7 +/-    1.70  0.050 / 0.060
G12     194.6          62.6               13.8 +/-    0.84      15.3 +/-    0.84  0.040 / 0.040
G20     198.5          31.6               14.3 +/-    0.73      24.2 +/-    0.73  0.030 / 0.040
G25     283.9          59.0               14.1 +/-    0.67      16.2 +/-    0.67  0.030 / 0.040
G29     311.7          33.6               12.1 +/-    1.56      19.7 +/-    1.56  0.050 / 0.090