PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-14:57:20
G01     87.4           32.1                6.8 +/-    0.99      11.4 +/-    0.99  0.030 / 0.020
G07     127.6          40.2                7.8 +/-    0.53      11.3 +/-    0.53  0.030 / 0.020
G11     64.5           36.2                8.8 +/-    0.81      13.7 +/-    0.81  0.030 / 0.060
G13     294.2          35.4               11.0 +/-    3.45      17.3 +/-    3.45  0.050 / 0.060
G17     215.9          58.3                9.5 +/-    0.94      11.0 +/-    0.94  0.060 / 0.120
G19     215.4          30.9               10.5 +/-    1.16      18.0 +/-    1.16  0.080 / 0.110
G28     353.3          61.4                8.2 +/-    0.54       9.2 +/-    0.54  0.090 / 0.110
G30     104.4          76.7                8.3 +/-    0.46       8.5 +/-    0.46  0.080 / 0.110