PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-14:57:40
G01     87.4           32.1                8.7 +/-    1.01      14.6 +/-    1.01  0.090 / 0.110
G07     127.6          40.2                9.2 +/-    0.92      13.4 +/-    0.92  0.080 / 0.100
G11     64.5           36.2                7.2 +/-    0.95      11.3 +/-    0.95  0.040 / 0.040
G13     294.2          35.4                9.8 +/-    1.37      15.5 +/-    1.37  0.030 / 0.050
G17     215.9          58.3               12.2 +/-    1.01      14.1 +/-    1.01  0.030 / 0.060
G19     215.4          30.9               10.4 +/-    1.60      17.9 +/-    1.60  0.050 / 0.060
G28     353.3          61.4                9.0 +/-    0.73      10.1 +/-    0.73  0.030 / 0.080
G30     104.4          76.7                9.7 +/-    0.35       9.9 +/-    0.35  0.030 / 0.030