PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-18:57:10
G02     23.4           63.1               13.8 +/-    1.33      15.3 +/-    1.33  0.040 / 0.050
G05     157.4          52.6               19.3 +/-    0.78      23.7 +/-    0.78  0.040 / 0.050
G06     50.3           21.6               10.4 +/-    1.15      22.0 +/-    1.15  0.020 / 0.030
G12     212.6          74.8               15.7 +/-    0.63      16.2 +/-    0.63  0.020 / 0.030
G19     95.3           12.4               14.5 +/-    1.73      38.3 +/-    1.73  0.130 / 0.180
G20     197.4          20.1               19.0 +/-    2.44      41.7 +/-    2.44  0.100 / 0.130
G25     302.8          52.2               15.5 +/-    1.14      19.0 +/-    1.14  0.030 / 0.050
G29     303.5          25.2               15.4 +/-    1.00      30.0 +/-    1.00  0.030 / 0.040