PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-18:57:30
G02     15.8           67.7               10.2 +/-    0.54      10.9 +/-    0.54  0.030 / 0.040
G05     161.1          47.0               14.6 +/-    0.76      19.1 +/-    0.76  0.020 / 0.030
G06     47.7           26.0                8.7 +/-    0.91      16.7 +/-    0.91  0.050 / 0.080
G12     234.6          78.8               11.3 +/-    0.60      11.5 +/-    0.60  0.050 / 0.080
G19     90.8           15.7               10.3 +/-    1.40      25.1 +/-    1.40  0.120 / 0.440
G20     197.2          15.0               15.1 +/-    1.64      37.5 +/-    1.64  0.100 / 0.300
G24     218.0          11.9               13.2 +/-    2.81      35.4 +/-    2.81  0.050 / 0.050
G25     308.5          48.0               12.2 +/-    1.89      15.8 +/-    1.89  0.040 / 0.050
G29     299.5          21.3               11.3 +/-    1.51      24.1 +/-    1.51  0.080 / 0.210