PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-22:28:10
G05     45.9           28.1                8.1 +/-    1.14      14.9 +/-    1.14  0.050 / 0.090
G13     88.5           36.8               10.0 +/-    0.67      15.3 +/-    0.67  0.040 / 0.100
G15     137.2          45.6               12.8 +/-    0.88      17.1 +/-    0.88  0.120 / 0.290
G18     238.1          34.8               11.7 +/-    1.29      18.6 +/-    1.29  0.090 / 0.270
G20     21.1           73.5               10.3 +/-    0.49      10.7 +/-    0.49  0.130 / 0.200
G21     305.4          42.1                9.4 +/-    0.86      13.3 +/-    0.86  0.140 / 0.220
G25     200.0          14.9               15.2 +/-    1.61      37.9 +/-    1.61  0.020 / 0.030
G26     298.1          19.4                8.6 +/-    1.52      19.1 +/-    1.52  0.020 / 0.030
G29     144.1          78.6                9.7 +/-    1.06       9.8 +/-    1.06  0.040 / 0.110