PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-03:12:50
G08     265.3          18.1                9.8 +/-    1.23      22.5 +/-    1.23  0.140 / 0.270
G10     60.2           59.1                7.0 +/-    1.03       8.0 +/-    1.03  0.210 / 0.260
G11     309.9          19.2                7.7 +/-    1.23      17.2 +/-    1.23  0.020 / 0.020
G14     270.7          67.9                8.6 +/-    1.02       9.3 +/-    1.02  0.020 / 0.020
G18     91.4           37.1                6.9 +/-    1.02      10.6 +/-    1.02  0.150 / 0.500
G21     154.2          14.7                9.0 +/-    2.60      22.7 +/-    2.60  0.140 / 0.440
G24     40.2           11.2                7.6 +/-    2.40      20.6 +/-    2.40  0.170 / 0.220
G27     230.2          15.2               11.3 +/-    2.62      27.9 +/-    2.62  0.130 / 0.200
G31     178.8          30.0               10.1 +/-    1.47      17.6 +/-    1.47  0.030 / 0.040
G32     333.1          74.2                7.5 +/-    0.31       7.8 +/-    0.31  0.040 / 0.050