PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-15:28:00
G01     88.8           31.8                9.3 +/-    0.82      15.8 +/-    0.82  0.070 / 0.130
G07     126.6          41.1               10.6 +/-    0.45      15.2 +/-    0.45  0.070 / 0.120
G11     65.7           36.6                7.8 +/-    0.54      12.0 +/-    0.54  0.030 / 0.030
G13     295.6          35.0                9.0 +/-    1.83      14.3 +/-    1.83  0.030 / 0.030
G17     214.8          57.0                9.7 +/-    0.82      11.3 +/-    0.82  0.070 / 0.110
G19     214.8          29.7               11.0 +/-    0.91      19.4 +/-    0.91  0.060 / 0.120
G28     350.7          61.5                7.7 +/-    0.52       8.6 +/-    0.52  0.030 / 0.070
G30     99.1           77.7                9.1 +/-    0.66       9.3 +/-    0.66  0.030 / 0.070