PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-14:27:30
G01     117.2          19.0               10.1 +/-    1.61      22.9 +/-    1.61  0.090 / 0.110
G07     89.6           62.3                9.7 +/-    0.52      10.8 +/-    0.52  0.140 / 0.140
G08     43.9           28.1                6.3 +/-    1.66      11.5 +/-    1.66  0.090 / 0.240
G09     175.6          23.0                8.5 +/-    1.26      17.4 +/-    1.26  0.120 / 0.250
G11     101.0          38.8                9.9 +/-    1.15      14.7 +/-    1.15  0.030 / 0.030
G13     317.8          19.1                6.1 +/-    1.18      13.8 +/-    1.18  0.030 / 0.030
G17     201.4          28.7                8.5 +/-    1.41      15.3 +/-    1.41  0.040 / 0.030
G28     296.3          57.8                6.0 +/-    0.94       7.0 +/-    0.94  0.040 / 0.030
G30     345.1          68.0                7.0 +/-    0.48       7.5 +/-    0.48  0.110 / 0.170