PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-15:27:40
G01     88.8           31.8                8.2 +/-    0.89      13.8 +/-    0.89  0.090 / 0.120
G07     126.6          41.1                9.0 +/-    0.45      12.9 +/-    0.45  0.070 / 0.110
G11     65.7           36.6                8.8 +/-    0.95      13.5 +/-    0.95  0.020 / 0.030
G13     295.6          35.0                8.4 +/-    5.13      13.4 +/-    5.13  0.020 / 0.030
G17     214.8          57.0                8.4 +/-    0.54       9.9 +/-    0.54  0.040 / 0.060
G19     214.8          29.7                9.8 +/-    1.58      17.3 +/-    1.58  0.050 / 0.050
G28     350.7          61.5                7.1 +/-    0.92       8.0 +/-    0.92  0.090 / 0.100
G30     99.1           77.7                9.1 +/-    0.50       9.3 +/-    0.50  0.090 / 0.080