PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-18:57:50
G02     18.5           66.2               14.6 +/-    0.70      15.8 +/-    0.70  0.020 / 0.020
G05     159.9          48.9               20.9 +/-    0.66      26.7 +/-    0.66  0.020 / 0.030
G06     48.5           24.5               12.1 +/-    1.99      23.8 +/-    1.99  0.080 / 0.050
G12     225.7          77.7               15.8 +/-    0.32      16.1 +/-    0.32  0.130 / 0.070
G19     92.3           14.6               14.8 +/-    2.61      37.1 +/-    2.61  0.030 / 0.050
G20     197.2          16.7               24.4 +/-    2.84      58.3 +/-    2.84  0.030 / 0.040
G24     216.8          10.7               21.3 +/-    2.58      58.5 +/-    2.58  0.140 / 0.180
G25     306.8          49.5               15.4 +/-    1.81      19.5 +/-    1.81  0.070 / 0.130
G29     300.9          22.6               15.0 +/-    2.25      31.0 +/-    2.25  0.120 / 0.330