PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-02:28:00
G08     286.1          23.4                8.7 +/-    1.28      17.7 +/-    1.28  0.140 / 0.110
G10     16.5           63.3                9.3 +/-    0.66      10.3 +/-    0.66  0.090 / 0.160
G14     235.7          52.8               11.9 +/-    1.75      14.6 +/-    1.75  0.030 / 0.020
G18     68.8           49.3                7.7 +/-    1.04       9.8 +/-    1.04  0.030 / 0.020
G21     148.3          34.7               10.7 +/-    1.40      17.1 +/-    1.40  0.060 / 0.090
G24     52.8           24.3                7.4 +/-    1.24      14.8 +/-    1.24  0.090 / 0.100
G27     247.3          28.5               11.2 +/-    0.67      20.2 +/-    0.67  0.080 / 0.100
G31     183.2          10.3               -5.7 +/-    8.38     -15.9 +/-    8.38  0.070 / 0.110
G32     256.3          70.0                9.5 +/-    0.51      10.0 +/-    0.51  0.060 / 0.080