PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-18:28:10
G02     352.2          76.4               14.9 +/-    0.58      15.3 +/-    0.58  0.030 / 0.020
G05     166.7          35.5               21.4 +/-    1.34      33.7 +/-    1.34  0.030 / 0.030
G06     43.4           35.6               12.6 +/-    1.43      19.7 +/-    1.43  0.060 / 0.090
G12     297.4          76.5               16.3 +/-    0.78      16.7 +/-    0.78  0.070 / 0.100
G19     81.3           22.3               13.6 +/-    1.82      28.3 +/-    1.82  0.050 / 0.080
G24     225.9          19.5               19.0 +/-    2.51      42.3 +/-    2.51  0.040 / 0.080
G25     315.3          38.0               14.2 +/-    0.73      21.4 +/-    0.73  0.110 / 0.260
G29     291.3          14.1               14.0 +/-    2.00      35.5 +/-    2.00  0.110 / 0.270