PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-17:12:50
G02     13.6           69.3               15.1 +/-    0.63      16.0 +/-    0.63  0.030 / 0.040
G05     162.5          44.1               19.4 +/-    0.84      26.5 +/-    0.84  0.030 / 0.040
G06     46.2           29.2               10.7 +/-    0.61      19.0 +/-    0.61  0.050 / 0.080
G12     257.4          79.5               10.7 +/-    0.82      10.8 +/-    0.82  0.060 / 0.080
G19     88.2           17.6               13.7 +/-    1.78      32.0 +/-    1.78  0.150 / 0.400
G20     197.5          11.8               17.5 +/-   19.73      46.9 +/-   19.73  0.130 / 0.390
G24     220.1          13.9               19.7 +/-    3.06      50.3 +/-    3.06  0.030 / 0.080
G25     311.4          44.3               12.3 +/-    2.20      16.7 +/-    2.20  0.040 / 0.060
G29     297.7          20.2               11.9 +/-    1.11      26.0 +/-    1.11  0.090 / 0.210