PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-21:12:50
G02     20.4           64.6                9.3 +/-    0.68      10.2 +/-    0.68  0.040 / 0.040
G05     154.3          53.8               11.5 +/-    0.46      13.9 +/-    0.46  0.040 / 0.050
G06     50.5           20.9                8.3 +/-    2.58      17.8 +/-    2.58  0.030 / 0.020
G12     208.2          74.2               12.9 +/-    0.41      13.4 +/-    0.41  0.030 / 0.030
G19     95.4           12.3               10.0 +/-    1.71      26.4 +/-    1.71  0.040 / 0.050
G20     197.0          20.6               13.3 +/-    1.87      28.9 +/-    1.87  0.040 / 0.040
G25     302.4          52.7               11.5 +/-    0.89      14.0 +/-    0.89  0.060 / 0.140
G29     303.0          24.1                9.4 +/-    0.86      18.8 +/-    0.86  0.100 / 0.090